OurDailyFred, sorry, i didn't see your reply until today...
Most states in the US actually don't specify a per-branch receptacle limit for _residential_ -- you're correct for commercial -- it's 10/13 max, for 15/20amp circuits, respectively. The NEC doesn't specify a limit for residential either, only commercial (where they have to assume an active load).
I'm in California, and the CEC doesn't limit it here either, except to state that the load must be balanced across circuits.
However, common sense reigns here, if anywhere. All my circuits were 20amp, and I limited to 10 per branch for general areas, with lower #'s for task- specific areas -- ie, the computer office has just 4 (duplex, 8 outlets total) per circuit, potential "entertainment unit" locations got 1 or more circuits, etc. Obviously this is in addition to the code-required "dedicated" receptacle circuits, ie, laundry, bathrooms, 2x+ for kitchen, and so on.