No he wasn't, and this is coming from someone who knew how to play more than 2 variations at the time...
Don't know how playing a different variation affects your understanding of Summoner but okay then sure.
I will say this though, his dirt was so powerful it offset any weaknesses he had, no matter how strong the opponent was all it would take is one touch, and no it wasn't guaranteed, but it might aswell have been.
Ketchup said it the best, every match up was an arms race to get your offense started first, an arms race that Quan would always win cause his offense was best in the game and he could initiate it from any position on screen.