To some extent the ratings provided can be taken into consideration, because based on several factors they make the rating such as the real time usage and so on. In the mean time ico's going as a scam even the project getting high ratings were the failure from the developer end for which we cannot blame the ICO rating people.
The ratings could be taken into consideration, but lightly. Unfortunately lately I see a lot more ratings that are not spot on and honestly not very clever. I still read them, but they are not what they use to be.