^^^^ What are you questioning with the WTF? ^^^^ The age, the gender, the amount, the time or the BrAC end result? It is about right, given my experience.
My wife and I decided to try a test a few years ago. I'm a gin drinker, she was a vodka drinker. She is 5'8", 140 lbs, I'm 6'0", 210 lbs. We both ate the same dinner before going out. We both ordered the same type of drink with the alcohol being the difference (gin and tonic; vodka and tonic). We both drank three drinks in a little over an hour. After waiting 20 minutes to get rid of the mouth alcohol, we both blew into a Portable Breath Tester (PBT). I blew a .044 BrAC and she blew a .09 BrAC. Size, gender, food consumption, do matter.