I prefer my Chainstay to not be slammed (done with all that mess these days) but I prefer it to be the way it ought to be. A little closer in than the middle. Enough room to take the wheel off easily but still have a nice length.
I can't really ride anything that sits further in than 13.5. It throws my manuals way off because the longer backend makes them much simpler for me. So no shorter than 13.3 or so for me. But currently i'm on a 13.75 and it's sitting at around 13.9 and I love it. Plenty of balance and pop!
And running it as short as possible is cool if you're a tech guy, but i'm not really big into all that shit anymore. I ran my fun day close to slammed before and it was fun for a little but it's too weird.
I could, however, see how I'd prefer it slammed on a park sort of frame. Like if I rode an S&M dagger now or a colony Sweet tooth, i'd have that shit as far in as necessary. Just to get it whipping and spinning fast. Plus when a lower stand over is introduced it makes the bike feel longer for some reason. (i went from a 9-8 inch stand over with the exact same geo otherwise)
References: OneGuyIlluminatiEye, robinson79, Brian Griffin, The Horror Contact, StoreBoughtChild, C_Johnsonbmx, dkTechEthan, etc.