You can't compare subjective performance (Such as winning or solo'ing more players), since this takes in RNG for dmg roles, and skill itself. I think it's been established that the amount of skill present in the 10-49 bracket is "abysmal" as another poster said it.
Since we are talking about the gear gap and twinking here then we shouldn't take into account anecdotal evidence such as being able to solo. I've solo'd two people before, too on my Lv 37 LolVengeance Jugg in around full blues. LET'S NERF ALL GEAR AMIRITE?
Who's talking about nerfing gear?