Yes, my iPad makes MUCH better calls and is a FAR more pleasant experience, than trying to use my iPhone for calling. Not only is the clarity much better but the volume (when needed in louder situations) is much better and has greater "presence," as well.
While talking with Tim Wilson on the phone the other day, we began talking about Skype and wondered if there was a Skype app that would work on an iPad. So while on the phone talking with Tim, I went to the iTunes Store and downloaded the Skype app. Within a minute or two, we were talking via the iPad.
I didn't wait for the 3G iPad. I didn't want one. I sometimes joke that "I already have one more AT&T account than I want." The only thing I truly hate about the iPhone is that it is on AT&T. I never knew what a dropped call was until I got onto AT&T. But talking across a WiFi connection, using Skype on the iPad, is quite a nice experience.
And once the soon-to-ship iPhone OS 4 is delivered to users this Summer (up here in the northern half of the planet), multi-tasking comes to both iPhones and iPads and then the fun really starts.
That Apple sold so many of these things so fast that they had to delay their introduction of the iPad in other countries around the world, is no surprise to those of us who use them now. It's a remarkable invention and for use around the office and the home, I prefer to route my calls to the iPad and let my iPhone sit ready for road trips.
Wait, I use GM's OnStar hands-free calling in my car when I'm on the road. I guess that leaves AT&T to fill in those rare moments when nothing else is available or better. And seeing as how there's little that isn't better than AT&T, that doesn't leave the iPhone used for much.