So basically, nothing is wrong with fast weight loss. Sticking to it is what is important. I started at 361, and lost 3-4 lbs a week, and so I lost 14 lbs in a month, and asked my doctor if it was unhealthy. He told me nothing was as unhealthy as being 361 lbs.
As long as you aren't starving yourself, and eating enough to get you vitamins/nutrients, you will lose more at a higher weight and it will slow down as you get closer to goal.
I think the blanket statement that fast weight loss is bad is just simpler for them to say, than don't take drastic measures to lose weight quickly, that you won't be able to follow in 6 months, or 3 years. Unless you are dealing one on one with a health professional, who is only concerned with you, most advice, whether on the web, or even SP, has to be for the majority of people, and be general guidelines. They are answering a question for everyone who reads it, not just you.
Russell - current BMI 28.6
197 - bmi 30 - done
164 - bmi-25
| current weight: 181.0