Walking Questions
334/222/185
All time recorded high 4/15/07 334lbs at the start of my 6 month approval journey.
Liquid Diet 10/15 329lbs - 10/29 309lbs = 20lbs gone forever.
DoS 10/29 309lbs - 11/29 282lbs = 27lbs gone forever.
11/29 282lbs - 12/29 269lbs = 13lbs gone forever.
12/29 269lbs - 1/29 249lbs = 20lbs gone forever.
1/29 249lbs - 2/29 239lbs = 10lbs gone forever.
2/29 239ibs - 3/29 230lbs = 9lbs gone forever.

That's great man. 5K walking a day is great exercise at your time post-op.
I've never heard of the 2 mile thing either. The more time you spend exercising the more you will benefit. If you don't feel comfortable running yet try to increase your walking times. Time yourself walking at a fairly slow pace then try to improve upon your time every day.
Set those exercise goals and go for them!