Quote from Hatsunechan;1280002:
A good Teemo should beat like every non-AP matchup. Impossible to beat 1v1 once he gets 6 if played properly.
Except there really aren't that many. Also, considering that I'm in 1.9k-2.1k elo area, pretty sure I have a decent idea of what I'm doing, especially against Teemos.
Problem with Teemo is that he doesn't have a good place in teamfights. Unless you're 5-0 by 10 minutes mark, it won't do much if even one of your lane is falling behind noticeably.
From my LoL experience, I'm gonna say this... unless you have 72%+ win rate on Teemo, don't play him to elo climb. There are always better top laners that will meet the needs of your team, and sadly, Teemo's top lane presence can be shut down by the tank meta.