Hi I was there mid Feb 07, and locals (eg Campo Base) told me that, overall, the weather had been a lot worse in January. It all depends on climate, which no-one can foretell. They also said crowds were far bigger in Dec & Jan - although I thought there were plenty around in Feb. As I saw it (literally) one "down-side" with Feb, and I suppose Dec & Jab, rather than early season is probably overcrowding and resulting state of dunnies at Plaza de M... Anyway, it seems to me that any time in normal climbing season (low, med or high) is fine subject to adequate acclimatisation, reasonable equipment and some luck (eg weather wise) plus of course some common sense. Keeping up fluids is important and can't be stressed enough as a key to safeguard from frostbite. It's a superb area, good luck and enjoy!