i dont count my time, so i can't say, also, doesn't matter, if you're a good player you can pretty much own things single handedly, the AI can take care of itself normally, so dont worry about it.
first time, nah, but i've beaten the game in under 2 hours easily. It's a very small game once you have all the higher powered things and know where to go fast.
i didn't use my standard ID to play RE5 online, i made a free trial one, and only played the story mode, no merc's etc. i don't think i'm anywhere close to the leaderboards.