So I tried the program on the Xenon and nothing worked. So I put my Mesh Hello program back on the xenon and things worked again.
Probably because the program I was putting on the Xenon had no mesh.publish only a particle.publish
Anyway, things were kind of interesting. The strongest RSSI value I could get was -19 RSSI with both devices an inch apart. The first meter away from each other the RSSI values fell to about -60 and then they slowly fell more. The lowest reading I got was -93. I have not done any major range testing yet. Antennae testing that @rickkas7 was doing at Mesh range testing would be very interesting.
At one point, I reported that holding the devices vertically really increased the distance measurements. I am not seeing that confirmed with digital values at close range, but perhaps at longer ranges the orientation of the Mesh devices becomes important.