Doubt it. I've worked for a SAAS company in the past that practices the incentivized review behaviour. Genuine (organic) reviews were indistinguishable from incentivized reviews. Poor reviews, which are the most valuable for this type of research, were always removed.

I was looking at a competitor's reviews just now, out of curiosity. They're so funny. The best one goes like this:

Pros: We love everything about this software! Especially A, B, C, D, E, F and G features!

Cons: It's always so difficult to wait for the next monthly patch! But it's so worth it!