Aliasalpha: Its a sacrifice of credibility for speed. They're usually the first place to have any major gaming news, you just have to ignore the crap to find the good stuff
Basically its the web analogue of g4tv, full of vapid superficial self congratulatory shit that you have to sit through to see the few bits of good information
Vagabond: All about speed nowadays, huh? :\
Depends on the level of importance you place on the information. Quality is worth the wait but when the end products of either form of writing act to communicate the same information from a third party it makes no difference to me.
For example a new video of assassin's creed 2 could have a lengthy and detailed description of the setting of the game and the advancements made from assassin's creed 1. In the end, no matter how eloquent or well written, all its saying is "Here's a new video, watch it". To my way of thinking, the exact same information is communicated by a post saying "new stabby stabby vid, lol!" just in a more annoying and inarticulate manner.
For actual information analysis and reviews of products, there's no way in hell I'd trust anything from kotaku or something similar.