The more recent ghibli movies use cgi, albeit while trying to stay true to their general esthetic. The next one is supposedly entirely in cg[0]. So hopefully he wouldn't hold anyone to a higher standard than himself? :)
I remember him saying somewhere that he didn't use CGI because he wouldn't have the time to master it any longer. He explicitly didn't say to oppose it for artistic reasons. But, yes, sorry, no reference.
Taken from the most recent documentary (by NHK?), Miyazaki does not use CG himself. He might attempt a comeback, i.e. doing feature-length anime. For the time being, Miyazaki is putting a finishing touch on a short anime (crawling caterpillar).
[0]: http://www.wired.co.uk/article/hayao-miyazaki-latest-film-cg...