Take this as anecdotal, but last year when I was dedicated to counting every calorie and working out 7 days a week I was losing about 1lb a week. When my birthday week came around I took that week off from work and I didn't exercise at all and I ate what I wanted, but in small portions. I lost 3 lbs that week. I think some times your body needs a break in routine and maybe just a break in general. Of course, it might have been a fluke too, but the following week when I got back on the stick I fell back into the 1 lb a week routine.
2012 Jamis Quest Brooks B17 Blue
2012 Jamis Dakar XC Comp SI Ldy Gel
2013 Electra Verse