Wow! Thanks everybody! I got mine in December from CA and they were shipped to me in WA state. I'm guessing it was a 2 day thing. They were wrapped in newspaper. I let them sit on the counter for 24 hours before I put them in the bator. I suspect shipping them in winter put them in arrested development mode (though it is doubtful they got below 35F in our milder climates). The guy instructed me they needed a full 21 days incubation...the 3 day fertility incubation did not factor into their hatch time. Actually, I think they hatched around day 22.
Shucks, wish I was on the ball sooner. I'd have loved some of your Delaware eggs, Kathy! I can't wait to hear the results from everyone. We have a nice big sample size for our experiment!