Hey Rober, I think that new queens who aren't laying right away, or take a break for a couple weeks-ish, get a bad rap. We are just coming thru a little 3 week dearth. Some of the queens stopped laying that whole time, some didn't. One nuc I was getting a bit worried about, gave it a few more days and, wa la, two frames of eggs.
I think in many cases, it's not the queen, it's the bees telling her when to Go and when to Stop for awhile.