I have noticed that from day one that everyone I have told that I am "low-carbing" has either had someone they knew who had great success or had been "told" by someone how horrible this "diet" is for you. My own mother when told about it said to me: "Well just be careful." I asked her why she would say that and she had no real response...just to "be careful".
Everyone has an opinion, it doesn't mean it is an informed or fact-based one.
Heh, I was telling a co-worker yesterday(he was evily trying to lure me out for ice cream) that I had been on this WOE for five days and had lost five pounds, when the woman who sat next to me turned around and snapped "well you usually lose a lot at first in any diet!" yikes, did I hit a sore spot?
I wouldn't worry about what others have encountered and see how your own body reacts. I have had benefits far beyond the weight loss that have made me think I would stick to this WOE even if the weight loss stalled/stopped.
Just my $0.02. :-D