The FACT is on the 6D Canon download page, there is no DPP software, only Photo Stitch.
Yes, and that FACT is true for just about every RAW-capable camera that Canon releases. For example, my PowerShot S95 came with DPP v3.9 on the included disc. That version added some nice features, like the * to ***** ratings and unsharp mask in the RAW tab. But, it was close to 2 months before that version became available for download from Canon - and it was 3.9.2 by then.
I think the pattern is that a new version of DPP ships with newly-released cameras (as it must, otherwise it would be unacceptable and shocking, as you stated), but the download is not available until that new version is further updated.