Thats true i guess.. but still there are so many tech-eds and people seen to get sent to those Even without repeat sessions there is a whole bunch of things that where not covered in detail at build. Imo the interviews charles is doing now about 4.5 (great stuff by the way) should really have been sessions at build, at least in part.
People are jumping at every chance to shout that wpf is dead, silverlight is dead and pretty much any technology microsoft already released is dead. Now while i dont really belive that, alot of people do. Microsoft has a reputation of constantly inventing new things and then dropping them, regardless if thats actually true or not.
Having fewer shorter conferances where there is only time to really talk about one thing is not helping this view
About developer content at teched.. i dunno man but i rarely see threads or blog posts where someone is raving about the awsome new feature revealed at tech-ed :/ Also there is no c9 live at teched and generally much less exposure of tech-ed than say, pdc or build. Now, i dont know if people are just missing the tech-ed content or it doesnt contain enough edge-y dev stuff, but teched dosnt feel like a dev conferance to me..
Personally i thought the IT-Dev ratio was more like 95-5% but if thats not true, great! Glancing at the latest tech-ed session list, i didnt see much developer stuff though, but maybe i have to dig deeper