I'm currently leveling two rogues (already have one at 90), one is 44 and sub, the other 88 and assa. The mobs now are really a pain, they hit hard, you don't. And I'm a bit old-school and roll without Deadly Momentum (well, I'm cheap - glyphs are expensive, k?). Pull too many - die. Unless you vanish. The good part is obviously stealth It does save you some time, I guess.
I don't really see myself leveling anything else because I love rogues too much and I hate leveling, so I'm afraid I can't really compare rogues vs. other classes. Well, I actually have a priest at 90, but I don't remember what leveling that bitch was like.
It's sloooow though! God, I hate leveling. Most tedious piece of shit. Wanna get 88 rogue to 90 so I can get raped by well-geared other 90s. Which is stil far more enjoyable than fucking quests and Shado-Pan monastery. I digress, sorry.