They tend to be unrealistic on the healthy/ideal side, but its hard to argue the obesity side (unless you are packed with a ton of muscle mass)
thats the thing, i do have a ton of muscle mass. even though i gained weight i still kept going to the gym and lifting. doesn't mean i'm not obese, but i'm not as obese as most 330 pounders.
Yeah, the obvious is that there is no one set thing to determine that for everybody. You gotta get the calipers out and all the shit to get the real picture.