But do people actually use them now for 'working' AM? I mean, if you're using an online receiver to complete or claim a contact, wouldn't that basically be a simplex version of Skype? You might as well just make a phone call.
I don't think anyone is suggesting using GT in that way all though it happened to me that way once. I use GT for antenna, modulation and audio testing. There is a nice 10 second delay so you can talk for nine seconds, then unkey and listen to yourself without any distraction.
I did this once and someone came back to me that I could not hear in my local receiver. This was just a fluke and not intended.
The real problem with GT is that most of them use "one size fits all" antennae or even worse so the signal strength is nothing you can take to the bank but is really likely to be better than what you hear.
The other thing you can do is to have your own DX contest. See how many countries you can work, give your self a sig report and GL in the contest. Send your log to Santa and you will receive a very nice certificate.
Jack
js