This reply made me smile, and is such a great example of why it's so hard to trust anything we read on the Internet, anywhere. I don't know which response to believe, if either, and don't know why I care so much either way.
they are both right. i've been using myfitnesspal for quite some time now, and remember reading that it was indeed a very small team (of just 2). now time has passed and they have obviously expanded. but they were extremely successful even at the beginning. i can't find the link right now but i'm certain that if you check out their blog, near the beginning, you will find something that resembles the 2man team story.
I would venture to say that almost every start-up begins with 1 or 2 driving forces, and branches from there. I am hard pressed to remember any that haven't. Anyone here think of one?
Edit: A little coverage in VentureBeat http://venturebeat.com/2012/04/19/health-tracking-app-needto... I just had to check. :)