Although I am admittedly not familiar with the low-level details of their design the way that AT was designed does allow for parallelisation of AT processing as communication between ATs does not occur "whilst they are processed" (any token amounts or messages sent from one to another don't apply at the point that they are executed but effectively after all the ATs have been processed for that block).
Correct. Agreed. See my edit. I realized that also while eating after posting my prior post. I was rushing because food was on the table waiting for me.