That has to be almost the funniest troll ever!
Perhaps he's been playing WoW too long to remember that playing a game should be enjoyable. I still play GW1 to this day because it is (a) enjoyable and (b) free to play. Stopped playing WoW some months ago now because it's just a gear race to be honest, and no real further storyline depth, and a grind fest. I know many players that only 'play' WoW 2-3 nights a week for 2-3 hours to raid with their guildies just to get more gear. If they enjoy that, good for them and that is fine. WoW is sadly one dimensional now and that's almost fair after 6 years of being the most successful mmo - note that this does not mean it is the best to play though.
Further, don't forget, GW1 only has 1 expansion and that is GW:EotN. Nightfall and Factions and Prophecies are all stand-alone, playable worlds and that they all have a common underlying theme is even more brilliant. The other little storyline missions and quest strings that link GW1 to GW2 is a another feather in the cap of a free to play mmorpg that shouldn't have survived over a long period of time.
To this day, the devs are still putting out small patches for GW1, but those mostly address events and slight pvp imbalances that may still occur.
Also, many GW2-bashers are overlooking the number of ways that you will be able to play your character and how this will actually benefit the game and its longevity.
I hope fervently that GW2 in no-way resembles WoW when it comes to skills and gameplay. I hope that the devs do not ask big WoW guilds to test the game out, so that we don't get another WoW-dungeon/raid experience (can see SWTOR suffering from this) and so far it all looks like GW2 will indeed be the fantastic creation that many are waiting for.