I spend longer than that on character creation ... then again, I also enjoy playing the game.
I guess this kind of speed run thing is done for the challenge but from reading that walkthrough it sounds like every other speed run I've heard of - using game exploits rather than playing it.
I saw a Baldur's Gate 2 run on youtube - it claimed that no mods or cheats were used but in the first 2 minutes he clearly uses a portal that's not available in the vanilla game (I think it exists but the door to it is locked/sealed and unopenable). So he got outside with Imoen and didn't have to do Spellhold at all - so in what way did he complete the game? Just getting to the end doesn't mean completing it to me, if you avoid playing most of the game to get there.