Sony A700 compressed RAW lossless or lossy?

Considering that ACR now supports compressed RAW files from the new Sony A700, can anyone at Adobe clarify if the cRAW (compressed RAW) files are lossy or lossless. I would ask Sony directly if I knew how.

I did not promise to tell you if the compression is lossless based on that file. I asked for a copy as a favour, for I'd like to take a closer look at such a file.
Perhaps I can determine the kind of compression.

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    >[sorry, I don't know how to loadup images here]
    Anna, you can't upload images directly to the Adobe forum, but must upload them to your own photo sharing site and then use a HTML link to the picture or the site.
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