Well Adrian, as if you are bored with nothing better to do, could you look at the signal packet for a large consist of engines and determine just how much longer the packets are for them vs. a single engine?
There were times I could get great response from running a single engine around the track. Then it would seem like "all hell broke loose" when I built a big train. MTH posted that running a big consist took more info to communicate with the consist. I believe they said each engine has to respond back correctly to satisfy the command?
Don't quote me exactly on this stuff as my memory is not working fully right now...