World of Warcraft.
Yes, gear does play a rather large role in PvP, but is also based on skill. Gear makes such a difference because 90% of the population don't actually know how to PvP. You have to know the enemy classes abilities, what they can do in certain situation, the cooldowns of each skill, etc. In short: 90% of WoW players don't know how to play their class.
(PS: Two shotting someone =/= skill)
Proof:
http://files.filefront.com/I_Suck_At.../fileinfo.html
This guy is godly at his class (Mage), and is a very good player. He represents one of the people from the 10% minority (people with skill).
BTW: Click the play button, the actual video comes after the Street Fighter intro.