I have been to WDW four times (April 1998/April 2008/Feb 2010/May 2014). Crowds were the worst both times in April due to it being Easter week. We actually used Extra Magic Evening Hours when they existed for all hotels to beat the crowds rarely even needing fast pass in the process. In Feb, the crowds were considerably less minus Magic Kingdom. Magic Kingdom was still insane in the mid-day even then. Just be aware unless something has changed Feb hours will be shorter than most other times of the year. Especially the period from the end of Jan through the first couple of weeks of Feb. I think AK was closing at 7, Epcot 9, HS 8, and MK 8 and they only offered Extra Magic Morning Hours back then. That was quite a few years ago though so maybe it has changed. Crowds were great back then. Stand by lines were easy for everything minus Peter Pan, Soarin, and Toy Story Mania. You literally only needed to fast pass those three attractions.
What I have heard is that crowds have become worse during what was traditionally an off-season at the parks. It seems taking advantage of party season may be the way to go now for a better experience, at least at MK and HS. I will know more about that when I head that way in a couple of weeks for my fifth trip. If you end up going in Feb, a word to the wise. It is not uncommon for major attractions to be down for refurbishment. This has been a constant thing with Splash Mountain. It was closed for my Feb trip. Also, while on sunny days the temperature is nice, the evenings can be cool with the breezes that Orlando have. It can be really cold standing near water and having the wind blow right at you and in my case that ended up being a cold for me. You may want a jacket. Whenever you make it to WDW hope you have a great trip.
