Good content/Bad presentation?

Don’t Let a Speaker’s Style Defeat Substance
A keynote speaker at Meeting Professionals International’s MeetDifferent 2010 has been generating sparks from bloggers who followed the conference, not because of his message, but for the way he delivered it.
The speaker was branding specialist Marty Neumeier, who preached a philosophy of radical simplicity for organizations in search of products that are both good and different. The message was strong, but for much of the audience, Neumeier’s style was his undoing.

Read the rest of the post … and what do you think… should a speaker be hired if his/her material is outstanding, but presentation woeful?