SS 29" question

Last season, I was still racing 26", due to UCI laws. I did one non-UCI race, which I also named to be the inaugural Open Dutch SS Champs. I rode mostly wih th same folks as always, but now on my rigid KM 29" in stead of a 29" racer hardtail. Out of 100+ sarters, I rated myself to be 7th on a good day in that field, supposing 26" and gears, but I did 13th with the SS, in my first-ever race on it. Unfortunately I can't speak out of actial experience with 26" SS, but perhaps it's like this :
SS forces you to ride in a totally different manner, to make it up hills or even go fast over a lap. The 29" addition could allow you to actually go fast, period, despite the SS restriction. When riding my KM in group trainings, casual rides, and races, it feels jsut like I'm cheating.
In the unofficial German champSS later last year in Berlin, I was the weakest of the leading group, but was able to stay with them for over an hour, I think thanks to the large wheels, and better momentum. I didn't have the legs to stay with them on ascends anyway, but the floating sections meant I was catching up all the time, while saving a bit of power even.
Bottom line, 29" is a good thing to start with, but in the SS situation, the benefits seem to be more apparent, and shear FUN!

34x20 here vs. 34x18 on 26"

I spent the better part of a year riding a 26" SS then made the switch to a KM. I echo some of the sentiments above. I would also add that the momentum of those big wheels rolling really helps the SS where it needs it most. Climbing is no comparison from 26" to 29". The latter is so much better. Yes, when you are going through extremely technical terrain where you are trackstanding alot, there is some difficulty getting the wheels rolling on the SS 29"er. Otherwise, it's a slam dunk for the 29"er. Another advantage for all 29'ers that I don't read very often is that the gyroscopic effect of the wheels really helps to smooth out turns; especially fast and/or bumpy ones. I notice when I am riding with people of similar ability (them being on 26" SS or geared bikes), I tend to lose them on fast and/or bumpy downhills, "rollers" or short and/or steep hills and long sweeping turns. And, unless they are pretty skilled on their 5" travel trailbike, I will tend to lose them in flat to downhill rock gardens, root tangles, etc.