Apple being a little underhanded?

I should disclose, i work for RIM.  Still, even if i didn't work for them, i'm a little shocked that Apple would sink this low.  Is it true?  Perhaps.
http://www.appleinsider.com/articles/11/04/07/apple_reportedly_caused_display_shortage_that_delayed_rim_playbook_1_month.html
Still, this is the tactic i take when fighting against aliens or killer robots.  Cut off their supply.  Even if it means you'll only delay them.  In the technology race, release dates are significant down to the day.