Ok, world, big fat disclaimer here: I'm not an experienced developer in all of the web frameworks that have existed in the history of ever (I've only done kinda serious stuff in three of 'em) and this thing I'm saying here is more of a hypothesis that I'm currently putting to experience's scrutiny than a rational, exhaustively thought, conclusion. Now, read on.
Nowadays, there are lots of web frameworks, and people have done wonderful stuff with them (twitter was written initially with ruby on rails, p.e.). And, truly, they have allowed the now commonplace fast, yet robust and standards compliant, development of big projects. But what about the little projects? Those little apps with at most a couple of tables in a database and a simple service to offer? Well, the really cool and experienced developers just do that in the big frameworks too...
Ay, there's the rub that makes big frameworks of so big a hype.
I see, then, at least two cases where a big framework is no more a quick way to do stuff, but becomes overkill: when your service - or product - is so atomic that in the server side you have few controllers and models, or when you build a mashup such that you can survive with pure client side code.
In cases like these, I, for one, would never create a ruby on rails or django project: you are gonna end up with lots of one liner scripts because there's a threshold when too much modularity and strict separation of concerns become little more than bureaucracy. If your service is a straightforward little one. Shouldn't the framework you use to write it be the same?.
That happened to me last night: I wanted to make a little one-weekend-single-geek-hackaton-made project and went for ruby, because, hey, chunky bacon. I wanted to give a try to ruby on rails 3 beta And wasted the whole evening of yesterday dealing with gems and the ruby language versions and magically generated files trying to display a doggone hello world haml-powered page. I conceed to the fanboys that it was my first time on rail's magical elven world. But my application was so little that I was gonna waste more time learning the intricacies of the framework than actually developing. I switched to sinatra this morning (being also my first time with it and my second attempt to programming in ruby) and had the models and a couple of views and controllers up and running in less than an hour. And it's not the first time, my first complete node.js powered app was also created in a weekend thanks to a microframework.
There, I said it. If you develop little applications with big frameworks you're probably lazy or a bureaucrat. Or didn't know that microframeworks existed, like me.