Well since i'm almost level 400, i was wondering

Why the hell i feel that the 25+min Exp. of winning or losing SR worth the same amount of Exp. that i would gain normaly from fast mode games like ARAM or Blitz nexus Like legit it feel like i keep getting the same amount of Exp. from SR after 30+min which almost equal the same amount of Exp. you would gain from 15min game in ARAM or Blitz.

Can someone tell me if i'm right or wrong about that.