Jellybean(official builds) make EVERY Android device run smoother and better. ...even the older Android handsets will perform as well, or better than the iP5.
Not saying you're wrong, but I'm going to need to see some benchmarks before I believe that. That's REAAAAALLLY optimistic.
I have the first dual-core handset EVER made, and it runs smoother with CM10/Paranoid Android/AOKP/Etc. builds of JellyBean. If Moto honours their promise of OTA JB for all 2011 devices, I can try it with a less buggy version. Project Butter is the reason JB is a cure all for old devices. And when I'm talking 'old devices', I mean 2011+ dual-core phones, and for the most part, flagships from that era, ie. SGSII, Atrix, RAZR, EVO LTE, etc. However, many of the new mid-range and budget phones are benefiting from JB too. I've used Froyo, GB, ICS and JB, and I can tell you that after trying a buggy half-baked version of JB, I just can't go backwards, it IS that much better. It'd be nice to have an RC or better release of CM10 for my Atrix, but until Moto releases the real JB update, it just won't happen.
The A6 does seem like a promising chip though. I want to see what it can do after the dev community gets at it though. Maybe they can make iOS a less boring ecosystem too.