Buyers: Does It Matter If Your Agent Can't Afford the House?

SFGate's On the Block blog wonders if it matters to buyers that many agents in the San Francisco area can't afford the houses they're showing.  Should this matter?  What else should matter?  What matters in this area?  Should it matter if your agent has had foreclosures?  Delinquencies?  Is simultaneously trying to sell his/her own property?  Is a part-timer?  Used "exotic" mortgage products?