This is good to know, Mike. We just had another single comb pop up in this hatch. This follows what you've said - birds from the fellow that threw the single comb do have good size. We're using his son this year, but now see we weren't lucky enough to have gotten away from sc yet. The other fellow threw the e+ (would it be e+ based on chick down?). We have a few decent blacks, but will certainly rethink our plans of using them - so much could be lurking under there.
We've had some goodies come out, too - don't get me wrong. Also, there have been some great genetics lessons in there for the kids. Luke was able to show some of his own hatches at fair last year. In addition to a couple of decent brown reds, he showed one of the e+ pullets. It's kind of nice that they have a "mixed breed" class for those projects that don't quite pan out. He was able to talk to the judges about why his bird wasn't an Ameraucana, its parentage, etc. (Judging the class has to be a bear, though!)
Hope all of this isn't moot - the depopulation of 5.3 million birds in northern Iowa has us a little concerned.