This is PayPal, remember? The likelihood they're using PhoneGap is so low that I'm going to state it isn't, without Googling it. (gasp) Did you read the first article?
I'm the same person as above, btw. I have noprocrast on that account. It is working very well for me ;)
They have, however, authored a Cordova plugin for others to use the PayPal SDK easily from their PhoneGap apps [1]