Warner's DD = Warners DD+ : Both are 640 Mb/s 5.1

[Matt X]

I've been checking out eproductwars.com for a little while, and posting under a slightly different name - I'm trying to post from time to time to counteract the raging FUD that Mike HD keeps posting there, and stumbled onto a technical question that I'm wondering someone more "codec-savvy" could answer. Mike HD was trying to imply that BR had inferior SQ 'cause some discs feature only Dolby Digital tracks, where apparently DD+ is the standard for HDDVD (implying that this minimum standard gives HDDVD consistently better sound )
I checked the link he provided and sure enough there are several BR titles w/just DD tracks - but I spotted a pattern w/ that, namely all titles (that I saw) w/DD tracks were also VC-1 video encodes. AND they were all warner titles, from what I could tell. My thought was this apparent lower quality on BR was a result of the title being PORTED from the HDDVD version, and I figure it would be easier (cheaper?) for WB to "downgrade" the DD+ tracks to reg. DD, than to "upgrade" to Total HD or something.

Any techies/insiders think this is the case? or am I wrong?