Tweeted to some Xirrus folks. And, 'coverage' is one thing. Actual usable bandwidth is quite another, as Mr. Jobs so publicly discovered.
Also, at http://goo.gl/oksl Cisco's Dimitris Haramoglis makes the statement "most 802.11n networks are running on the 5GHz band." Truth, wishful thinking, or has Cisco successfully moved their customers to 5GHz for primary usage? What are YOUR customers doing?