Yes to all the above.
Now to be honest I have tried and become fairly good at the textbook Euro stroke and I do very well with it using my Sting Ray and Eagle Ray Aqua Bound paddles, and also with my Warner Kalliste, but because I very often go out in windy conditions I have found a lot more security in the Greenland style stroke. With all 3 - Greenland, Aluet or Euro type paddles.
I have been blessed in my efforts to gain tips, and one person who was extremely helpful to me is a woman who teaches kayaking in Greenland named Tula. She has send me a few short videos and demonstrated that there are several different ways the Greenlanders paddle, not just one way, but also gave me the same advice I gave you. Try them all and do what works best for you.
And overall the best large overview I have found so far for “all things kayak” is from Paulo Ouelett in Canada (Dancing with the Sea)
Jyak on this forum has also been super helpful in tips to help with that textbook technique with Euro paddles. He focuses on efficiency and how it effect speed and ignores most other aspects of performance. But for the use of a euro paddle as it relates to speed,. Jyak is a very good source of info.
In addition to his teaching I got good reinforcement from Online Sea Kayaking out of Great Britain.
But yes, my own personal “standard” forward stroke is mostly a Greenland stroke. I do more torso rotation then most others show, but that doesn’t make me right and them wrong.
I find that going about 60-65 SPM and having a lot of rotation from the butt up, I can paddle for long days even on week long trips and going all day long and I never feel fatigued. And with my longer-than-most paddles I am moving my kayaks a good distance on every stroke without using so much energy that I “run out of gas”. If I try for 75 SPM I do tire out but I also cover a lot of miles in a short time.
I have never done a race and feel no desire to do so, (no one around here to do it against anyway) but I have had several paddlers and one man who rows a rowing shell with 12 foot ores all comment at my speed, saying they were amazed at how fast I was going and it looks like I am not moving my body all that much. Bret Green (my friend with the 19 foot racing shell) gave me a GPS to time me in a 1 mile leg, and was going to row along side in his Shell, but was astounded when I stopped at the beep and he was about 300 yards behind me and had to catch up. I don’t remember what the time was now, but he was shocked. He “knew” there was no way I could go as fast as he could in his shell but despite him using two 12 foot ores on the roller seated “water rocket”, not only could I “keep up”, I was so far in front of him he was unable to catch me. And Bret used to race in one of the teams in California so he’s no newbee to fast craft.
How fast was I that day? I don’t actually remember and I can’t really guess, but it was fast enough. Fast enough to shock Bret anyway.
My Sister wants me to come to Alaska and do a trip with her and her friends and when I got into kayaking I was afraid I’d be the “baggage” and not be able to keep up. Her and her friends are all experience Ocean kayakers. Her friend paddling guide and professional coach has met me now, and we did a few hours together on the lake here, and he give be firm assurance that I have nothing to worry about, and that I am cruising faster then many of his clients and friends he takes out on the coastal tours.
Besides, for touring and photography along the coast up there he says they never go faster then 4 MPH, and most days they go 10-11 hours ,but at only 3 MPH. A 30 mile day is fairly normal if the weather doesn’t force them to shore. In some cases their day/leg is only 16 miles. A very long leg is 35 miles. But day time is a long time in June, July or August in Alaska. Speed is not the most important thing on a tour. Being there is most important.
So I ignore the numbers myself. As long as I am not going to be the guy causing others to wait, I think I now am doing ok in the speed department, and so I now concentrate on maneuvering, rolling and rough water skills. If I go up the coast in Alaska I am not there to see how fast I can get past all the fun and beautiful things there are to see. But being able to handle myself and perhaps be an asset to others in the group when the seas get rough is important to me. So a stroke that is always in place for a brace just makes the most sense to me as my default stroke.