I'm abnormal with my only putting 2lbs on, I was overweight to begin with and am now eating less than before, I was also ill and lost 10lbs at the start of my pregnancy. Midwife says that basically baby is gaining weight and I'm loosing it which is why it isn't changing much, I'm hoping to be a size 8 after having the baby haha! I wouldn't worry about it too much, one of my (slim) friends due in April has put on over a stone already and you can't see that she has on at all, must be all baby which I'm sure is he case for you too.
If I was to be a bump buddy I wouldn't want responsibility for someone who may go end of Jan as I'm still working until the end of jan so wouldn't be able to update all day. Is it just a case of posting on this thread when we hear from them? Sorry for the questions that have probably already been asked!