OK I installed in two deep TTBH's in mid-May. So far everything looks OK, but they still have not really built up. I have maybe 5 "fully" drawn bars in each hive and they are slowly working on more. I did not feed alot and am not feeding now based on some of the recommendations here, so maybe I am paying the price for that. I did have to combat cross-combing so that probably stunted them a little bit.
I am planning on watching the flow and may need to feed if there is a dearth, but I think I see capped honey on the bottom of the combs, so I don't think they are starving. They look like good brood combs, but there are no honey storage combs to speak of.