I change my setup to ...d5 when I'm playing the KID and they try the london. I usually try to make it a reversed catalan but I'm not even sure if it's sound.
This is actually a Bf4 Grunfeld and not a London.
Yeah that's the Grunfeld :P ... black can play very actively and try for c5 to break open the center (it's not a pawn sacrifice despite appearances) ...
The annoying thing is when white concedes equality if not a slight advantage to black by playing c3 instead of c4 and says 'come and get me' :P.
When looking at Master games pay attention to the ECO codes as they are the most commonly used, it helps a great deal in sorting out opening theory and references. Start here: http://www.sahovski.com/other/index.php?other=5 Names are more problematic, especially here at Chess.com, since everybody seems more interested in pasting their name or a pet name (for whatever reason) on every variation and sub variation.
The New in Chess system (http://www.newinchess.com/) is also helpful and has the advantage of using generally standard names along with its code but it is not as widespread. You can go to there online dBase, input an opening sequence and have it classified by there system. For some odd setups you might have to extend a few moves to get to a standard position due to transpositions.
