I think it could be true, and lucky you.
I have been on SB 4 days now, and I noticed today that my watch is sliding past the nobby bone on my wrist, it can slide around my wrist - where as before it actually left marks on my wrist from being tight.
I don't weigh in til Sunday, I hope it is good. I am glad I did measurement to, because I know you can lose inches and not pounds sometimes.
But, good for you. Keep up the good work.