How much weight did ya'll lose during the 2 week liquid diet?
I am hoping to lose 15 pounds....is that unrealistic?

I lost 13 pounds with your BMI I think it's possible.  Just stick to it.

 I'm on day eight and have lost 7lbs. My bmi is 35. 

I start my liquid diet next Tuesday and have surgery on 7/17/12.  My doctor requires that we loose 15 pounds in that time in order to shrink the size of the liver to make it easier to access the stomach.  My wife just had her surgery on Monday and was able to loose 16 pounds during her liquid diet so you should be able to.  Good luck.

I lost 12 lbs in a week and half.  My surgery was scheduled after I started and it didn't allow enough time to get a full 2 weeks in.  I didn't mind though and neither did my surgeon.  I was ready to get it over with.

I was only on liquids for 3 days though.  After that I switched to replacing 2 shakes a day with 2 small meals of lean dense protein and a veggie per my nutritionist. 

I lost 13 lbs on the 2 week diet (started at 200).  3 Costco Premier Protein drinks a day and that's it besides water - 480 calories.

 I lost 20lbs and know some that lost more...