Seeing a Volt on the road, (well, plugged in at least) is a start. Until the infrastructure is in place, electrification of vehicles will be slow to gain wider acceptance.
On a related note, Canopy has dropped its rates to $8/day, which is in line with USA Airport Parking across the street and one dollar more than the economy lots at DIA which recently raised their rates. Since the first visit, they have added charging stations. There are “Juice Bars” both in the covered parking ($14/day) and the indoor valet ($18/day). However, it is not clear whether priority is given to plug-ins (hybrid and pure electric cars) for the general covered parking. On past occasions it appears that non-electric vehicles have been parked in the space.
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