I'm hoping that going to a smaller displacement engine in skids and CTL's isn't going to turn out like Ford's powerstroke when it went from 7.3 to 6.0 and bumped hp and torque up considerably. I just had two heads go out in my 6.0 which only has 84k miles and has had all scheduled maintenance, been driven gently, and still had it's share of EGR and other emission-related problems.
I'm in a Bobcat s750 which has the displacement but lacks the torque. Only lately as the engine has hit close to 750 hours have I noticed that I can stall the machine fairly easy binding up the mulcher or while digging.
I too am curious to see what the G series JD does when put through it's paces. I think the feedback from the CASE guys has been favorable with the smaller displacement motors in the bigger machines but how they will hold up over time remains to be seen. I personally like the design of the current series and was interested in the improvements that were coming to the E's.
"Life is tough, but it's tougher if you're stupid."