See, I've always assumed the exact opposite based on how rough the user experience is on so many Microsoft products.
I've often wondered if it was possible for a web developer at MS to sit down with IE for 30 minutes and not think "I have to fix this.... now!" When I realized how awesome Chrome developer tools were I never wanted to go back. But of course, as a web developer, you have to go back.
Or maybe that is the problem. Maybe too much dogfooding blinds you to how great the competitor is.