Was Mexican Earthquake Pre-Planned?

Was Mexican Earthquake Pre-Planned?:
Accusations of a man-made earthquake in Mexico are flying around the Internet as a result of a planned emergency management exercise coinciding with an actual 7.4 Richter scale earthquake. From the Dutchsinse blog:
This is profound and disturbing. There was a “drill” planned for March 20, 2012 in Mexico for a 7.9M earthquake “simulation”…. also on a separate note.. Barack Obamas daughter was at the epicenter on spring break: WTH is going on?!
Might there be anything more than coincidence here? Dutchsinse explains his thoughts further on his blog. (Thanks to Andrew H. for the tip.)