as there was so many in the carton it just wound them up and made them angry
But...had the carton been covered with cling film? Sounds like it wasn't. If covered the bees in the carton hardly know they have been moved. You could then put a piece of card under the carton to prevent them escaping before positioning it close to the hive entrance. They can then return almost directly to the hive entrance, as they escape from the original slits in the cling film covering.
would that be a normal cunsumption time if they were really low on stores?
Actual consumption might depend on temperatures, wind-chill, amount of ventilation, how far the cluster is away from the floor, how much space above, size of cluster, etc and whether the fondant was the only source of carbohydrate. Seems in the right ball park, would not be much less and could easily be double - who knows, but you will need to monitor regularly with small dollops (another word for the NBK to look up).
Once the bees have found the fondant a feedhole is perfectly adequate for the bees to access it. It is not like they are shifting, it once clustered. Autumn feeding at high rates is different altogether. They can easily remove a kilo through a feed hole in three weeks without recourse to slapping it on the top of the frames.
However I will reiterate, before PH jumps, that this arrangement is what I would use for late winter if the colony were light; not quite the same if it is devoid of stores by mid-December. With a full 14 x12 box in October, they are very unlikely to need extra feed before late February, and not even then, usually. Autumn feeding is to raise the stores levels for the whole of the winter so they can be left without interference, from Novemer to March. That is what I try to do.
Never fed anything at all last year (autumn or winter). I expect to this winter as they are mostly on ten frames only; by late Feb, some are more than likely fed with 1:1 (or sugary water, even) to encourage brooding - to have foragers ready for the OSR in early/mid April.
RAB
carton of fondant
carton - box for goods, so box for fondant
of - preposition meaning concerning, pertaining to
fondant - soft sweet of (flavoured) sugar
carton of fondant = box containing (unflavoured in this case) sugar sweet (large sweet in this instance)