Lee Sin's E makes him pretty hard to trade with especially with someone like Jax. Couple that with a strong shield and Lee Sin's not even scared of Jax's stun. --- LoL: Ecchi Baka Currently reading: Freezing, To-Love-Ru, and a lot of other titles
Lee Sin with his W and E makes him win trades all day long at top against other bruisers until said bruisers are able to get a few levels and items and hope they scale up past Lee Sin. Oh wait... Lee has amazing ratios on his skills also as well as still always having that Exhaust whenever he goes to trade as well as passive attack speed increase that he always has and his shield...
If you auto attack to do damage, you won't be beating Lee Sin 1v1 if the Lee Sin is good. If you use skills as an AD caster at top to do damage you might have a chance at certain points depending on how well your skills scale but even then you better find some way to harass him down to the point where you can burst him directly to 0% or you're never going to kill him with his kit.
Lee Sin is very OP at top. Once you know how to play him he's literally free elo, even more so than a lot of the other champions. >_> --- http://oi41.tinypic.com/9ht4ea.jpg No matter which way you slice it you'll both be ending up in Hell!
Contrary to popular belief most top lane match-ups are in fact skill. While, it's true a lee sin maxing W is pretty much immortal, if he makes a mistake you can still capitalize as any champion and win lane.