Just had a very revealing conversation with Canon. They were great to talk to. Quick response, knowlegable, and spoke English.
The gal on the other end went through the litany of doing a nozzle check, head alignment, and printing directly from EZ photo print. Printer is working fine. She also acknowledged that I will use very little red and green (unless I'm printing Christimas colors, in her words).
In the process of comparing a picture she had me print with printer color management, one I printed with my Spyder profile, and one printed at Costco, the real issue came forward. I had been comparing all my prints under tungsten light because I work all day and play at night. Today I laid the prints on my desk in direct (cloudy sky) daylight and OMG the greens in the Costo and my own profile matched perfectly! Put them under a desk lamp and the greens go grey.
The Canon Plus Glossy II paper looks completely different in tungsten vs daylight. She said other papers, even third party papers will behave differently.
For those of you who already know this I guess this was a great learning experience. I'm now very satisfied with my printer, and look forward to trying different papers.
For those that asked, I'm using Photoshop PS3, with Windows XP, and normally letting PS3 manage colors. That is I turn off all color management in the printer setting.
Thanks all, for your input.