IMHO it's best not to set time-oriented goals... Because although I guess it can be a good motivator, it also sets you up to be disappointed and/or feel like a failure if you don't reach it. I mean, imagine that you don't meet the goal, but by April 9th you're down 18 lbs or something--instead of being able to celebrate the
awesomeness of those 18 lbs, you'll be hung up on the fact that you didn't lose 4 more. Seems unfair to me, hehe.
BUT, since you asked, I will share with you that in the first few months of my WL I averaged about -4 lbs/wk... I started 7/18/08 at 263 lbs and I believe I hit 238 lbs around the last week of August. I don't at all present myself as a "typical" weight loss case, or as having stats that you should try to reproduce, BUT at the same token, don't lose your motivation just because FitDay says it isn't possible! Everyone's bodies are different, and who knows, yours might respond to your efforts better than they seem to think it will.

Hehe.