E, because nothing screams "I'm a professional!" like having an RIM brick at your side.
Seriously, there have been surveys done that revealed that un-technical people equate business/power and reliability with size when it comes to technology.
The same survey led to the $199 Walmart G-PC, which used components roughly the size of a laptop Motherboard, to be housed in a larger full-sized tower case.
Why the empty case?
"Because Walmart shoppers equate the power of the computer with the size of the box" according to several surveys. Guess what? the computer sold out in 3 days. Google Gpc by everex and walmart for more info.
What does this say about Blackberry users? Well, many of you already know my opinion...