It's tough to say. They could have went through JC's memory optimization thread and removed a lot of files/themes/apps such as voice activated dialing, etc. They may not have any 3rd party apps or themes installed. Are you sure you didn't read it incorrectly and they only have 4.5 MB?
The difference between stupidity and genius is that genius has its limits.
When you take things for granted, the things you are granted, get taken.
Even a mosquito doesn't get a pat on the back until it starts to work.
Too many people miss the silver lining because they're expecting gold.
[BES 5.0.3 / GroupWise 2012 HP2]