Yup. Agreed, Iowa. Though 200->150 isn't for me!! I have gone from 225->210. I want to level-off at 210, maybe a shade under. Reach a steady state between 205 and 210.
BTW, I also drink GOBS of water. I don't measure it but I've done it for years and years. On a commuting day I'll have (no kidding) probably 10 - 24 oz bottles of H2O.