Why not? I was pretty sure they wouldn't say anything.
Why can't they if they planned Linux release already? They said they'll announce it "soon". It didn't happen so far (the announcement).
They also said the GOG downloader would be available for Linux. They seem to have become more careful what they officially announce. I don't think they officially said they had the Witcher port planned so "planned" could mean that they are going to port it to Linux if they can
and before release things probably don't change so notably that they can promise it now.