OK, here's the short version (I don't want to try to get into a whole bunch of details that I don't know. MOST of these HDI's are "Company Machines" located at sites where I DON'T work. I just made a call to get some info)

9 HDI's, 7 of them are 2010's (1 is a friends) 2 others are BRAND NEW (2011's, I'm told)
All 6 2010 Company Units piled their trans between 480 and 550hrs. All trans were sent back to dealers, and then forwarded to ODG for inspection. All took about 8-10 weeks to be returned (Rebuilt). No info is available to me as to what went wrong.
8 of these machines have had Fuel Pump, AND/OR O2 sensor failures.
1 of the 2011 machines was backed off the trailer, driven to the fuel tank for fill up, and piled the Trans when it was pulled away from the fuel tank (It never made it 1 km)

2 of the 2010 models are aproaching their 1,000hr mark, and SEEM fine, but they SEEMED fine while aproaching their first 500 as well. The issue that I'm finding is that these new Transmitions seem to be 500hr units. Of the 6 that I have anything to do with, all have piled the transmitions between 460 and 520 hrs. My experience with the older style is 1700 to 2500 hrs before rebuild, and the reason for the larger variation in the older style is becouse I only (Personally) have experience with 3 that have needed rebuild. I don't claim to be an expert, but when you consider the length of time that the older and newer styles have been in service, I think that does say something.
I do hope I'm wrong about that, this is just one guys experience talking.