neil,
russians are quite conservative on stores (and pack it away), they are also very conservative when there is a dearth of nectar and pollen (queen stops laying or slows down), she also slows down come early fall. also, russian queens tend to start laying a little later in spring months, but when they do, (both pollen and nectar coming in) a colony can really get away from you if you are not paying attention.
i keep 2 deeps, 9 frames langstroth for each hive. the russians survive our winters minus any problems. in the past few years i also add extra feed via a feeding rim, even though the top deep may be heavy with capped honey. just extra insurance. like any other bee, capped honey inches away and they won't move sideways, but they will move to the feed directly above them. sometimes amazing to me opening them up in spring to find the amount of honey frames left and a smaller cluster. i have kept 3 deeps. it's really not practical imho.
lee also brings up some good points; location, philosophy on feedings and requirements for your location. i rarely have to feed sugar syrup, unless there is a dearth (anytime during the season), or they are not heavy enough going into winter to my liking. sometimes i just feed back frames of honey i did not harvest in the fall or from a dead out from a previous season, if i have them.
i have not kept warre hives neil, and really have no knowledge of keeping bees in them other than what i have read.
you have had russians in the past i thought? what has been your hive configuration?