Maybe things have changed but carry-overs were fish that had been in the lake two winters. Planted as fry, hit OD in the 8-10" range and the next OD as quite a bit larger.

I know that WDFW is now stocking a lot of different sizes of fish. Some are pretty scummy broodstock but they are also stocking some fairly large legals, especially as the season extends.

Then, there are a few enhancement groups that hold some rainbow in nice disease-free water and feed them up to (if stories are true and what fisherman would lie-Rivrguy) fish capable of stealing rods from the angler not intently watching things.