Icy Veins administrator Vlad explained that the decision to work with members of the community came from the growing workload required to maintain the site, stating that "the amount of time and attention that we were able to dedicate to each guide dropped."
"[We] decided that we had to find a way to do better," Vlad said. "So, we contacted experienced players of each class and spec, and asked them if they would be willing to review our guides, and offer any corrections or pointers required. The responses we received have been overwhelmingly positive, and after more than a month of intensive work on the subject, 31 of our 34 class guides are now reviewed and approved by either a prominent theorycrafter or a top player of the spec. The remaining 3 guides will hopefully receive the same treatment soon."
Vlad says the site will continue to work with these players in the future, so it looks like we'll be able to rely on a standard of quality from their class guides from here on out. It's definitely a brilliant concept, in my opinion, especially since I've been wanting to dust off my enhancement shaman this patch.