They seem biased to me. A friend of mine who's doing an ICO told me that they paid 10ETH for 5 quality ratings and that's that! I noticed that some ICOs with good project, team, and good social media presence are struggling with getting good reviews.
With all that said, should it still be a factor to look at when investing in ICO?
Personally, I don't trust any sites that review ICO projects except for ICObench. There are some respectable experts who act as ICO advisors, but still... you should do your own research before investing.