Chad- Leaving them bee would be my tendancy at this time too and yes, I'm using 9-frame spacers so it's not just a matter of sliding things over and inserting another frame, I'd have to pull them all, remove the spacer and put them back or- move them into another brood body without the spacers. Either way it's an annoyance to the bees which are just getting comfy.
Like the person that just replied, my boxes would be pretty tight with 10 frames.. they'd fit, but getting them in/out would be a lot more difficult and I'd be rolling bees in the process.
I do have 2 more hives for which I'm expecting nucs any day now, perhaps I'll set THEM up with 10 frames and perform an experiment!!