Thanks to Martin Kulov’s Blog: Any CPU vs. x86 vs. x64 I got a reference to a great article explaining this in more detail.
The obvious points are 1., 2. and 3., but it is 4..7 that makes the article really worth reading.
–jeroen
PS: a few more relevant links
http://stackoverflow.com/questions/247098/x64-net-compilation-process-explorer-oddity





