I too would like to see an expanded answer on why GridView et al are considered "bloatware." I have extensively used GridView as well as 3rd party products (Telerik, etc) and find that for the majority of internal and some external projects, they work great. They are fast, easy to use, customizable - and BEST - I can hand them over to someone who knows GridViews who can then easily pick up where I left off. If I were to hand-code all of the numerous apps/controls, the overhead in the next person figuring out what is going on would be enormous even under the best of circumstances.
For me, I can see some of the 3rd party products being bloatware (but still sometimes useful), but the bare-bones GridView I've found to be quite fast with moderate queries.