Not sure I do, foxhound. Is your question speficially to non DVR users or just non TiVO DVR users? I'm not sure how else you could record HD broadcasts without a DVR that supports the resolution (or a Media Center DVR-like equivalent).
My crappy Comcast DVR records HD channels at HD resolution. The HD shows take up more space on my DVR than the same show from the regular D1 (720x486 interlaced) channel. So, there is more data in the HD recording.
Not sure if that's what you were asking, though.
-Kevin S.
I know it must be great to have a DirecTiVo, but for those who don't, this question is for you. Do you record HD content in HD? Not, ''Do you record HD content,'' but, ''Do you record HD content in HD?''

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