Can confirm I'm in manchester and alive after risking it for a biscuit and going via A57. It's not closed and there's a fair amount of traffic going through at pretty much normal speed. Was a bit concerned by the light snow in sheffield but it didn't materialise into anything.
There are a couple of bits that might get icy if the temp drops massively, it's wet and salty at the sheffield end (make sure screenwash works, it's filthy out there) and there are ice signs around snake top and on the steepest bend before it but it's not bad, lots of people on it keeping it clear.
Another thing, the road from A57 towards Bamford is supposed to be uncleared, covered in snow and dangerous according to the highways agency, looked pretty clear to me and there was traffic going up and down it.
edit: No queues at Mottram, glossop was a lot less busy than a normal weekend too.
