Testing... Is this thing on?

I'm at NYC Resistor, testing out Skype over my 3G MiFi card. So far it seems that it's not even close to reliable as a voice solution, even on full bars. Here's a recording of a call on the MiFi. The message was: "Testing call quality on Skype with MiFi 3G. The quick brown fox jumps over the lazy dog. Test." :

Not very good at all. Wifi calls are much better (as you might expect):

The conclusion is, don't rely on Skype over Sprint 3G as a full fledged voice replacement for a carrier. Its great for SMS and email, and these are generally enough to hold me over until I get on wifi, assuming I really need to make a call.