The Alpinist editor who contacts companies and sets up the reviews was recently confronted with the following response from a company's PR folks after specifying an item or two for the review:
"Obviously, giving away equipment and then receiving a low rating wouldn't be much appreciated"
As Mitch Hedberg would say... "You've got no faith in the product itself."
If you aren't willing to allow for an honest review of your gear, don't let it be reviewed. To agree to a review with a guilt-laden caveat that the reviewer "owes" a good review is total bullshit.