Yes, I would agree. 13 pounds is amazing! I struggle to get 1 lb off in a week of skipping suppers, but I am having carbs too. I think at a certain point the body realizes it has some fat cells and no longer needs the same water balance.
And bravo to the ‘not going back’, same here. I am running(actually doing wind sprints) at least once a week, and I go through a light-weight high rep major muscle group work out, it takes about 35 minutes, and I don’t worry so much about the smaller muscles because they will be used some and won’t fall far behind. It also will maximize the circulation, thus discarding more waste.
Here’s a couple of links if you are interested;
The 7 Main Muscle Groups
http://www.illpumpyouup.com/articles/the-7-main-muscle-groups.htm
Here Are The 11 Major Muscle Groups And
Why You Need To Focus On All Of Them
http://www.weight-lifting-complete.com/major-muscle-groups.html
Ugh... feeling a little weak and woozy now... it comes and goes.