The web is a complex platform, so it's definitely not hard to wind up using some feature that performs well in one browser but poorly in another. I don't know that it necessarily reflects badly on any individual browser--software is complex and it's hard to determine what combinations of web features will wind up being widely used. I do think it's a shame when this happens because sites don't get tested in anything but Chrome. There's no excuse when large companies release webapps and don't test in multiple browsers.

(Disclaimer: I work for Mozilla.)

i remember years back when people were installing Chrome simply because it had Adobe Flash built in and didn't require a system wide install anymore. For a while, that was the biggest reason my friends installed it. Then Flash started going away, and they were still using it, and wrapped up tightly in the Googleverse with Gmail and then Android.

I recall Firebug being one of the reasons for sticking with Firefox before Chrome had dev tools.