When I first started fining (pretty sure it was a warmer month) I noticed a significant reduction in the amount of sediment in each bottle. I wasn't massively fussed about overly clear beer (hell I think i used to neck that stuff straight from the bottle) but less sediment in the bottle suggests less sediment in the brew. Now I cold condition and fine togther (and drink, civilly, from an appropriate vessel while wearing a cravat and reading one of the poet laureates).
At the end of the day adding gelatine to a brew is so cheap and simple, it's got to be worth a shot at least once or twice.