I havn't seen anyone use this strat for this stage so I thought I would show it off real quick.

Amoeba's run uses a similar strat.

Yeah, there are a few strats similar to this, but they're just not consistent enough to warrant that level of risk that late in the run. Besides, most runs on the leaderboards, my own included, can save plenty more time on the stages around quick turn (fluctuation, folders, linear seesaws and birth).

I'm not aware of a frame-perfect fast strat on folders? What's that? I was just talking about getting good walls/bounces and saving like, up to a second with a good stage.

I don't know if it's frame perfect but the IL for folders gets a very specific series of hits. Also since Birth was mentioned are there any resources for getting consistent on that stage? I haven't been able to achieve any consistency.

That depends on whether you're on NTSC or PAL. The way NTSC does it doesn't work on PAL, and I imagine the converse is true. I can throw up a video guide to PAL if needed but odds are you're on NTSC. I can't speak for how easy it is to do, but you should get a good feel for it by watching jcool's run.