I mean listen to how Eminem spit on the forver song and the new song with lil wayne called drop the world. Hes using the gradually spit faster and faster style which anyone who knows anything they would know tech pretty much invented that.
The way Tech raps is kind of a midwest thing, at least as far as I know, that’s where it grew from. Listen to Twista, Bone Thugs, Krizz Kaliko, Dalima & D-Locc, etc. Granted, Tech is very unique with his rhyming (the backwards rapping), but he didn’t invent rapping fast.