Several points. Firstly, Nikon is not losing an avid supporter. Just because I could possibly be switching systems doesn't necessarily mean that I suddenly think Nikon is rubbish. Similarly I've never considered Canon to be rubbish, just that some of their supposed strengths were not all that strong/important.
Nothing's changed, I still view Nikon as a perfectly useable tool, as I do Canon. My potential switch has absolutely nothing to do with IS, DO, widespread USM, allegedly better AF, or any other reason like that I can think of. I have four very specific reasons to consider the switch, one push and three pull factors.
I have no problem with my existing Nikon setup, and there is nothing wrong with the gear I have.