Absolutely, and especially in regarding the ratio to his general size. Ofcourse we have to look at the proportions of sprinters to see if we can find patters. Conversely, Usain Bolt does not appear to have big glutes compared to the rest of his general size. (I wonder if that is illusion, and he allways wears his running vest on the outside of his shorts, so his vest hangs over his hips a bit, making it a little more difficult to analyse his physique.)
The gluteals are very important and strong gluteal function helps the psoas to also have great function when you run. There is a bio-mechanical relationship between the glutes and psoas.
Tyson Gay has great gluteal developement, yet he gets his psoas injured, which is strange to me.
I have noticed that Tyson Gay doesn’t have the best (theoryetical) timing of leg fold. He seems to butt kick (from behind) a lot, rather than whipping ‘under.’ I wonder if that could be tied in with some of his psoas problems.
Then again, his lower legs are so skinny, no wonder his feet fly upwards VERY quickly - as soon as his feet leave the ground.