^^Even though it is kinda moot at this point I still have to ask to not let us make more out of this than it really was, they postponed the shows because they wanted to have more time to rehearse at the O2, which they wouldn't have had by the original schedule, because of other shows taking place at the O2 until 2 days before Michael was due to start.
Here is the original statement issued on May 20th (they went more into detail on a Q & A held by Ortega and Philips):
A statement on the singer's website
www.michaeljackson.com says, "Due to the sheer magnitude of the This Is It concerts at The O2 arena promoters and producers AEG Live and Kenny Ortega, Michael's directorial partner and creative collaborator have elected to move back a few of the opening shows in order to meet the challenges presented by such a massive and technically complex show."
The changes are
o July 8 will take place on July 13 2009
o July 10 will be moved to March 1 2010
o July 12 will be moved to March 3 2010
o July 14 will be moved to March 6 2010
AEG Live president and CEO Randy Phillips adds, "Kenny and Michael are, at the same time, both creative pioneers and perfectionists. This show has grown in size and scope, thereby, necessitating more lead time for manufacture of the set, programming the content for the massive video elements, and, most importantly, more time for full production and dress rehearsals in the world's busiest arena, the O2.
"As much as we agonized over this change in the original schedule, we are sure the fans will understand when they experience the level of entertainment Michael Jackson intends to deliver while also ensuring the safety of the musicians, cast and crew and the crisp execution of the production."
http://www.musicweek.com/news/read/jackson-dates-postponed/039985
It was only 5 days, if Michael missing rehearsals would have been the reason to postpone they still could have made up the time in those 1 and half months they still had until opening.
Geez, reading this brings me back to the feeling of excitement and happiness we all had... and then it went all to hell.