Given that Ubuntu 10.04 only had its formal release on April 30, it's obviously less than 2 weeks. When I decided to go full time with Ubuntu 8.04, it took close to a month before I was comfortable with it and almost six months before I was fully familiar with it.

You have a valid point about the Creative Suite not being offered for Linux, but any blame for that can be laid at Adobe's feet. The same applies to AutoCAD, SolidWorks, and many other apps; any blame for there not being a Linux-compatible release can be laid at the feet of the OEM.