I didn't stay in formal education beyond high school so I can't really comment, but from that article:

"Unfortunately, some of his colleagues felt that he did not secure sufficiently large research grants. So he was to be fired."

However, Imperial College' statement on his passing claims otherwise:

"Contrary to claims appearing on the internet, Professor Grimm’s work was not under formal review nor had he been given any notice of dismissal."

http://www3.imperial.ac.uk/newsandeventspggrp/imperialcolleg...