Well, we answered that question. Hubby tipped the nose down a little and then I felt like I was sliding forward the entire ride (which my parts did not appreciate, of course). Though maybe my saddle could be pushed forward just a hair. We've never done the plumb-line positioning, or anything, and I did recently go from an 80mm stem to a 100mm (which definitely makes going into the drops comfier, but it's riding in said drops that's making my hoo-ha all sorts of annoyed...can't win, heh).
Man, I wish we'd get warm enough for me to do some rides without the tights layer over my shorts. Then I could at least eliminate a factor. This neverending Winter is really starting to tick me off! I'd love to get this figured out before my 2 upcoming duathlons when I will want to be in the drops a lot.