I am running windows on 1280x1024, but lower the resolution and the text doesn't look that great. Since most still run under 1024x768, it looks poor. I guess that is more down to the resolution they are running, but looking at those screenshots, it's improved under Vista, but still not quite at OSX's standard. Again I blame the resolution of the screenshots used.
I will however say that my comments were more of a general comment on Windows than an attack on Vista alone.