Lol, at least it was worth the try to help the forums :p hf :p

I was playing through not exactly for a speed run but just to get to the end game fairly quickly and ended up dying just before the call for the Ganton gym, maybe it's an odd glitch but if u pick up the phone call whilst the death tutorial is active when u first die it teleports u to the gym.

I picked it up too early I think so it put me back at the hospital when the text came back, but for those few seconds I could run around and got halfway to stealing a car. So I guess this could be something of a warp speed up but just 10 of so seconds :p

I'm not gonna test it because I just don't want to :p but it might work if u answer the call on the last text box explaining the death tutorial :p hf if this somehow is applicable :p soz if its been found already