As I’ve posted here, here, here, and here, air ambulances are expensive, dangerous, and slow. USA Today is a bit late to the party, but they have a good summary article on the topic (Surge in crashes scars air ambulance industry).
They do add one interesting factoid that helps put things in perspective:
July 18, 2005
Since 2000, 60 people have died in 84 crashes â€” more than double the number of crashes during the previous five years. During that period, more than 10% of the U.S. air ambulance helicopter fleet crashed. If commercial airlines lost the same proportion of large passenger jets as air ambulance companies lost helicopters, 90 airliners would crash each year.