How long? They announced the Mac Pro, what, 8/6 right? (sorry don't have calendar handy). Intel Launched Woodcrest 6/28...you might be confusing Dempsey and Woodcrest because Dempsey did launch in May. A few months I would constitute as 'long' but when you're refreshing a product line from one architecture to another and SHIPPING it the day you announce 8/6 isn't 'long'
You could have been like the other guy, announce a system 06/28 but they didn't ship em until recently. Read the fine print of the announces, all of them say 'available within 45 days' where as Apple was able to say Available now, except mine which needs a wireless card and that apparently is a few weeks from now.