It's pretty much the standard to have edit notices in italics but I can change it if you want. I really don't like the bolded Today/Yesterday notices but the way its coded means I can't really change that for the moment.
I've kinda got used to ignoring it, so I still don't really care.
But if we do
keep it then I'd prefer the grace period a little longer than 3 minutes, since my network connection's sometimes really slow and an edit can take at least that long ...