Yeah, that's the review I read. I don't know if Blu-ray discs ever prohibited bitstream output, as the only references I saw were to HD-DVD's. Even those references were bordering on rumor, since there was no way to test it without hardware that allowed bitstream output. Some time I'll have to go hunting for feedback from XA2 users who have tried to output TrueHD (or DTS-HD MA, although I don't know how many HD-DVD titles actually have DTS-HD MA content) to learn how it works and if there are any issues.
The screenshots in that review indicate that there is a setting in the BD30 to force it to disregard mixed content and output a bitstream ("BD-Video Secondary Audio: On/Off"). There is also a screen shot of a receiver's front panel actually reporting the new formats and decoding them, so clearly it works for at least some discs (and potentially for all discs, assuming that the secondary audio "off" mode doesn't run afoul of and lose out to some previously un-seen disc flag). Unfortunately, the review doesn't mention what discs were used for testing. It also doesn't mention load time for the newer, more Java-intensive titles like Pirates of the Caribbean - something that I'd be interested to know about considering how painfully slow those titles can load on other players.