Really? This is the first I've heard of that. Is a 1000w 5sec guy not ever going to hit 1500w with years of training?

I've gone from 1040 to 1170w over the last 7 months, and I do only training to raise FTP, no group riding, and no racing where sprints would matter so essentially I never sprint. It seemed to be rising along with all the other numbers, but now I'm a bit discouraged as to what the future holds for my sprinting.