Tour de France 2009

So how long does it usually take to get the results through? I thought they caught people whilst they were still riding in previous years? Is it just that the drugs they are now using are a lot more dificult to test?

Probably a myriad of factors. If Astralosa had tested positive for a test from May then he may well have been caught during the tour. There are lots of riders to test and lots of tests to do. It also all costs lots of money so its no surprise its not lighting quick.