Do ppl really lose weight that fast?

i'm tired of seeing ppl who weighed 300 lbs turn up 200lbs thinner in 6 months|even on tv, celebs and fitness gurus act like its been all exercise and eating right that caused them to loose their weight|is it just me, or does anyone ever notice the raw-edged nostrils and ripped veins in the foreheads of these ppl|obvious indications that their cocaine-snorting loony bins|the drug increases metabolism and supresses appetite|that combined with little to know activity, is a classic set-up for weight-loss... unhealthy weight-loss at that|the sh*t is so obvious and ppl buy into the commercial bullsh*t|UNBELIEVABLE!