10s are still playable, just need few days to adapt.
no opinion on stainless steel.. i tried once a very long time ago, the sound seemed a bit colder than normal strings, and the strings themselves were "tougher".
you can setup the guitar yourself, there is absolutely nothing magical in that ! only issue would be a floating bridge... but still doable, if you're patient and careful.

plankton.. strings are just strings... it's pretty hard to "HEAR" differences between them. The only bad memory I have is with the Dean Marley strings, which sounded really poor and lasted 2 days.

About the Fender Bullet, they're OK, I used to choose them for my Strat... I would say they tend to get dirty/darker a bit faster than d'addario, but otherwise, it's pretty identical. I don't recall having the feeling "How man, they sound SOOO good when they're new !!", something I always tell myself with D'Addario ..
The benefit of the "bullet" is inexistent : i never had any problem with regular strings tip

And finally, I promise you that your fingers will bend as sharply and quickly they used to do with .09. Just give'em some days to get used to the extra tension, so that your fingers muscles (actually, forearm's) will develop.

the fatter the better on an acoustic...

you're not playing slower with heavier strings, that's a myth... you just need stronger fingers, with more endurance, but otherwise, you can still legato like thunder. Vibrato and bend are pretty hard to do on .013, but then again, after a while I did get used to it.

sean.. yes, all new strings require something like 30 minutes of intense playing and tuning before being absolutely "still".

that's the jimi's way... i'm very skeptical about this method though. Scientifically, i could relate that to heating up steel very quickly, and cooling it down very quickly; It is supposed to give extra-resistance to the metal... or is it to increase rigidity ? Can't remember. Should try it.

Why strings makers are not using this method if it works ?

more harder ? that must be way too much hardest
what i'm saying is that Jimi Hendrix used to do that on the strings : boil'em. And ppl says it's a good method, it works, the new strings are in tune faster, and they also last longer.
as a science guy, the only thing I can relate it to is the quick heat / quick cold process on steel, which does modify its properties.
and yes, i'll try one day... i don't care about spoiling a set of strings.. it's all in the name of science !

jemi > 0.011 ? and you're shredding over them like there's no tomorrow... woaw man, i'd like to see your fingers are you tuned in standard E ?