On second thought -- that's not true what I said.
ORIGINALLY my trunk DID open fully with the key fob.
But it doesn't any more -- only about 6".
And most likely when it changed was when they did the RECALL work, last fall -- this was for "faulty tape protecting electric circuits in the trunks of some vehicles. Repeated openings and closings of the trunk could snap a wire and cause rear lights and license plate lights to stop working."
Here's an old thread on that recall:
http://www.tsxclub.com/forums/showthread.php?t=3335&highlight=recall
I imagine they corrected the problem of the "faulty tape" for the '05's, and maybe that "correction" somehow restricts the opening of the trunk??