He wave clears so easily that once you hit 6 you can most likely push the wave to the turret, waltz on down to Bot and Ult someone for an easy kill.
I feel he thrives on a team with a few hard AoE CC champions (Amumu, Leona, Cass) cause he can just sneak in and destroy the APC or ADC and get out before anyone realized what happened.
I also feel that his Laning is great pre 6 because of your W/Q/E harass. If you're spamming all of his moves like crazy, yeah, you're gonna run out of Energy REAL quick, but I feel like it's more rewarding that way since you have to plan what combo to use in certain situations. Often times I've almost killed the enemy laner just with Q/E harass without even using a single HP pot.
I've also never lost to an Akali mid lane. Zed can EASILY destroy her. Kat is harder to deal with due to her Shunpo, but I've never had a serious problem with her.
I may be Silver III, but I feel that I understand him pretty well. He's real easy to pick up and play once you understand his skills, but becoming a real threat is the hard part.