Don't take this as gospel, but from their behaviour today (I was visiting with them for hours today), they seem to like the B&B nestbox alot.  Or at least today they did.  Yesterday they were having a hissy fit over at the Bleachers and I thought they were going to consider nesting there!!  I'll have to see where they hang out tomorrow ... but I do think that they should start egg-laying this week.  I checked the B&B box today and nothing there yet.
I know, not the yes or no you were looking for, but enough to keep you all guessing!