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?
I just use ico tracking or rating sites as an aggregate to get the links of all ico that is going on at a specific point of time.If you want review go for specific sites.