As a PHP/Classic ASP person, I ventured into webforms world about 5 years ago. After having to handcode things like table grids, calendars, etc, in scripting languages, it seemed like webforms would be a tremendous helping-hand. It was...that is until you need even a slight bit of customization beyond alternating row colors and the like. Yeah, you could have a gridview running with a few drag-and-drop motions. But customizing even what would seem like a simple thing could turn into hours of torture and research.
I also think a lot of the examples given in .NET online are oversimplified for the effect of making webforms look "easy". Sure you can get that gridview to show only 10 records of a 100,000 record table, but do you realize that ALL of the records are being loaded into memory by default? As an example of the over-complicatedness of rectifying that problem, I spent a while creating a pageable gridview that only loads chunks of records, but it wouldn't work. After an hour of research, I found that you had to delete an extra property that the IDE inserts into the codebehind. Not fun when stupid stuff like that sets you behind.
And at every turn, it happens.
Don't even get me started on viewstate.
But then the clouds parted, and .NET MVC was handed to us. Now THAT is a framework. If you are a web developer, you should know whats happening when someone makes a request to your webserver. The abstraction and layer of cruft that webforms put on top of that is a disservice.
For the most part, I'm able to develop applications at the speed of PHP scripting and FINALLY have TOTAL control over the UI. That's what it's all about.
And as an additional note: People need to stop complaining that they are creating "tag soup" in MVC views when they find they have to use <%= %> tags and the like. Drag and drop your gridview onto the page, set all the properties, then view the crap it gives you. And your not nearly done yet, now you have to attach events and put more gridview-related code in your codefile. Talk about messing up the coding experience. I'll take a simple foreach loop anyday.