Found this review. I'm never sure if these are real or just clever marketing.
I'll tell you what. The first few items of that "review" jump out at me as total ---That which is odiferous and causeth plants to grow---. There is NO WAY, NONE, that installing drywall takes "months". At the most, a half-assed semi-competent boob would take a week or two AT THE MOST to drywall even a LARGE basement (think double the size of yours).
Secondly, drywall dust WILL NOT be in your house for "months" if you have someone with half a brain. "Years" is a stretch beyond belief. Water damage to your basement drywall means you have problems that should have been addressed before studs were even put up in your basement.
If you're finishing your basement, odds are you are going to be finishing areas that are going to be used as living areas. The drywall isn't going to be damaged any more than any other drywall in your house. Seriously, the guy makes it seem like people throw up drywall just to "pretty up the place" but you'll still throw bikes, lawnmowers, garden equipment, etc down there, and just casually throw them against the wall if you ARE going to do that.
The guy's numbers don't add up either. He stated drywall was $17/ft - $20/ft and the stuff he's commenting on ran $25/ft -
$35/ft 
and later on, referred to spending
a third again as much. $35/ft would DOUBLE the cost of what he said they paid for drywall, in addition to, in his own words, being just for what should be considered a "basic" finishing job (walls, ceiling joists, and some electrical). Read too, that "They may balk at $25 but $35 they should certainly take."
In his words, he speaks of people paying "a third again as much". That'd mean for what he paid for drywall, it would equate to $23/ft and he stated he STILL paid $5/ft more than THAT. For the size he claimed his basement to be, that equals out to $500+ more than his third again as much claim.
For someone who stated one of the problems was a high-pressure sales guy with very little specifics, he certainly didn't give you any ADDITIONAL "specifics" other than to KIND OF narrow down the price range you MIGHT be looking at.
I see large problems with that site, wild exaggerations, and a failure to run his own math, seeing as how he claims to be "people who can afford to pay a premium", someone who's not a fool or a "bullible yokel", and is "financially savvy". IMO, it REEKS of an ad or a planted website for revenue-generation.