Hammett, founder of Castle, the father of MonoRail, went to Redmond invited by the ASP.NET MVC team, to review the new framework, and give his opinion based on his experience having built a similar framework.
You can have a look at the blog post where he wrote his opinions, but I'd like to quote here the ones I feel are the most impressive:
[...] surprisingly - at least to me - is how MS is approaching this framework. They are not in a rush, they are more concerned about getting it right than getting it done fast. My overall impression is that...