MB,
I wouldn't say nothing. I am expecting some late nectar filling the combs shortly, even from the new colonies of the year.
Considering that I expect most will fill the brood box long before they need to - but all mine are on 14 x 12s so that is equivalent to a standard brood and a super. Just that one cannot guarantee it. That is without feeding a skerret of sugar (other than the A/S halves with lots of larvae and with few flying bees -to just to get them over those first few days until the new queen hatches, ie no more open brood, and after I 'allow' them to build up the flying bees numbers after the risk of a secodary swarm has passed).
Note I said combs - They will be filling drawn comb at this time of the season.
Now a new colony (from a nuc), without enough bees 'cos they've been 'storing' instead of brooding so never get a surplus foraging force and similarly not enough wax builders (other than for enough wax for the unecesssary storage space for the feed given) either, until too late in the season, you are likely correct. Spot on even. A lot of nucs were relatively late starters this season due to the weather, of course.
People don't consider the time delays in the brooding cycle and the time before those bees become wax builders and, later, foragers; and how diverting the house bees from brooding to these 'other duties' has a knock-on effect on brooding.
In days long gone, it seems, when a new beek learned the ropes from a beekeeper who sub-conciously knew what to feed and when to feed, the new beek had time to pick up the finer points.
Recently there has been this explosion in new beeks and they are taking advice 'to feed' meaning just do it, and do it, and do it.
Then they are 'amazed' and 'proud' of themselves when they have umpteen drawn combs and think that is successful beekeeping, without giving a passing thought as to what the bees actually needed for colony expansion.
Also, no 'olde tymer' looking over their shoulder and quietly pointing out the errors in their beekeeping, or asking the simple questions to make his protégé think through, and work out, the signs and symptoms of the brooding situation. A simple ten lesson course and straight in these days. Likely in at the deep end.
Sorry, but there are a lot out there that don't think of all the rammifications of their actions. Not meaning to pick on new beeks, but every new beek should be working out what to do, and asking themselves questions as to why they are carrying out any particular procedure. There are some who may have been keeping for sometime with very set ways of doing things. Wood/poly/plastic comes to mind, as does framed/TBH types of beetainer. And of course the bees usually put right most of our mistakes so sometimes those mistakes are not even acknowledged.
If the new beeks simply heeded the 47 years experience of Finman and the combined 'hive years' of the more 'senior' members (and I don't include myself in that group after only a decade keeping bees), they would not go anywhere nearly as far wrong as some seem to be doing of late. End of rant.
Regards, RAB