No, they do not. Revealing a small area once a minute does not counter him. In fact, it makes you counter yourself.

Grez is a really BAD item, Sweeper is borderline right now after it's buffs, but still horridly under powered compared to the other items. Number prove that on their own. And oracles is simply too expensive for the minor ability it gives, because it disappears when you die. Which Teemo's friends can easily help with because they have vision of pretty much the entire jungle all the time.

Also, do you really think Teemo cares if you sniff out a single shroom once am minute? Considering he 2 a minute with no cdr, no...no he does not. Teemo is out of control on this map, it's that simple, his shrooms provide far too much utility with almost zero counter play.

itt: noobs don't know how to deal with Teemo shrooms.

yeah, I dislike spending 250g every five min just to stay alive as a squishy character

This, pretty much.

Teemo instant lock ISN'T a sure win. Sure, the little rat can be really annoying with his mushrooms and map control on early game; but it can be shutdown and it won't be that efficient in team fights (which happen a lot in this map from mid game onwards).

People didn't know how to drop a pink ward in Eve's lane and you expect them to use the HIDDEN TO SOME PEOPLE consumable tab to counter Teemo? Not happening.

Inb4 Teemo nerfs.