Given the snippet of Smith we heard I'd imagine it's quite early and I'm also pretty certain that...
he won't recognise them immediately cos his memory's a bit frazzled
Other way around... he remembers them, they've got amnesia - or are faking amnesia for their own purposes...
Well actually I wonder if in fact
both the Doctor and the Daleks don't reconise each other. I am just going on that snippet I know, but it does sound like a man having a sudden realisation of who/what he's dealing with rather than someone who knows full well what a Dalek is