I think this is a hilarious title, but it seems to be true, atleast in Washington (DC) according to this NY Times article, (Registration is required, and is free)
A YEAR ago, Tripp Donnelly saw his BlackBerry as a social liability � an accessory with all the sex appeal of a pocket protector. But now the gadget makes the rounds with Mr. Donnelly, 31, even when he sheds his jacket and tie for a night of barhopping or clubbing. He started keeping it with him when he realized he was missing social e-mail from the growing population of Washington women who were carrying BlackBerries themselves
What probably leaves a slight feeling of ambiguity is the following statement:
The BlackBerry gained a foothold in Washington two and a half years ago, after the Sept. 11 attacks left many in the city incommunicado when cellphone services were overwhelmed. BlackBerries worked fine that day (the proprietary network that carries their signals, for a monthly fee, has far less traffic than the networks used by cellphones), and shortly afterward the House allocated more than $500,000 to outfit its members with them.
The berry uses the ‘pager’ network (I am not sure about the newer berries, like the quark). It is conceivable that the pager network is more robust due to constrained capabilities.