I had the chance to test again today. I was going to post the results in a spread sheet, but they were 100% positive, with a few caveats.
First test was between 52', 65' and 110'
Flash: 2x 580EXII, 1x 600RT, all manual mode at 1/128th in 2nd curtain
Camera: 1DS MKIII manual mode 1sec @f7.1
The 600RT was in front of my car firing through the front window to the back window, and this is what I considered "obstructed."
10+ shutter releases. No misfires*
The second test was done at 110' with all flash guns in front of my car no more than 2' from each other.
10+ shutter releases, no misfires*
The last test was using 2 flash units, one 580EXII and one 600RT, both in ETTL 2nd curtain -3 EV
Test distance was 90' and 105'
Flash units were 17' a part and both were fully obstructed behind tree trunks.
Same number of shutter releases at varying exposure settings.
10 shutter releases from each distance.
* There were misfires, but from what I can tell, they were due to uncharged units, the Odin TCU not talking correctly to the units, or a combination of both. The solution was to give the flash units plenty of recycle time and equally important, to give the Odin TCU enough time to talk with the flash units on each standby cycle.
Although the camera, flash units, and receivers are not in stand-by, the Odin TCU seems to go into stand-by mode in about 5 seconds. When the TCU is "active" it will have a solid green light on the front panel. When the TCU is in "stand-by" the green light blinks.
In order to avoid misfires, I had to hold the shutter release down long enough for the green light to stop blinking, and long enough for the TCU unit to talk to the flash units. The time took approximately 3-5 seconds after the green light became solid, then misfires were resolved. Alternately I could simply trigger the shutter and wait a few seconds and then start shooting.
In summary, I think Odin needs to increase the TCU stand-by time to at least 60 seconds. That would prevent the vast majority of misfire problems people may have.