At least as far as I can tell. I think it is an interesting question because light novels are in a lot of ways the most interesting kind of material that gets adopted in the past 10 years.
Man, how old was Full Metal Panic?
Anyways, I’ve made a spreadsheet. You can see the full screencap if you click on the image to the top of this post. The methodology was going to Hashihime’s calendars for Winter 2011 and Fall 2010, listing all the TV shows that ended in Fall and the shows that started in Winter, and then mark the ones that are light novel adaptations. With a couple exceptions (like this one).
There’s a nuance in that some of these shows have manga adaptations, but at least one source (ANN usually) would say it is an adaptation of the light novel. In reality it doesn’t matter, because either way the light novel came first.
Feel free and please drop corrections on the spreadsheet in the comments!
Maybe I will write more about this later, but the immediate observation is that a lot of these are manga adaptations, and while I was making the list, most of the titles I ignored are either your Fairy Tales or PreCures, which are JUMP-type crap or original shows. Light novels and properties originally as games are in a small minority. There is also a growing number of “media mix” type situations where it’s original, but there’s also a manga or even a light novel to go with, or in the above case as I mentioned, an original light novel series that has a manga adaptation way before the anime. The numbers seem to suggest this being almost as frequent as light novel adaptations where the anime is first-to-adopt.
It makes you wonder what the heck is Railgun actually.