It has been written like this for as long as I remember. If it is a change, it's not very recent.
Anyway, I find Carlson Rezidor hotels to be among the best when it comes to early check-in and late check-out and they usually go beyond those two hours they promise. So far, I always got whatever I asked for (including 16:00 at hotels where regular check-out is at noon and check-ins before 10:00).