It's not like i'm gonna ever dare try and speedrun this game, i'm just curious considering the lack of first person and FPS limit of 30

That plus the extremely slow loading times, it isn't viable

Unfortunately, as Ben mentioned, with the slow loading times you also have the inability to save warp effectively, no first person, inability to do the ledge buffer glitch, and worse on foot controls that would make it impossible to beat the current WR even with perfect gameplay.

also on top of what was already said, the FPS being capped at 30 means brake boosting and curb boosting would not have as much of a big effect as PC, and the lack of first person makes a few strats like the grenade strat in crystal maze impossible on top of other things. Basically in summary, you can't get WR with Xbox 360