Whether you can lose 10 pounds in 4 weeks depends on how close you are to goal, how aggressive your diet and exercise programs are, and perhaps your gender. Men lose more easily than women, which accounts for the feminine majority on SP.
FWIW, I lost 9 pounds in my first 6 weeks on SP. I'm content with that, but I won't be shocked if the next 9 pounds don't come off as fast.
"Discipline is remembering what you want. " - David Campbell
Max Lifetime Weight, 221
SP Start Weight, 196.6
Initial SP Goal, 175
Current Goal on Ticker, 162
| current weight: -0.2 under