I was with DIRECTV for about 4 years before T invaded, and with T for a little more than 4 until I left - basically the same amount of time at both places.
While with DTV I had two different bosses. The first for 3 years and the second for 1.
While with T I had 4 different bosses. The first was the DTV carryover and lasted almost two years. If you're doing the math with me that means in my final two years with T I had three different bosses. Three. The last one was only a few months before the surplus notice.
The reason? Constant, incessant, pointless re-orgs. There were zero re-orgs with DTV. In my 4 years with T there were five. I stayed with my same team for the first two, with all of us being moved under different VPs both times. The last three split up my team each time, and moved me under three different bosses. In two years.
And people wonder why T is such a clusterfrog.