This has pretty large implications for countries (namely china) with still a sizable IE6 userbase. IE6 doesn't support TLS by default, making https effectively completely unsupported for that browser.
Isn't it an option? I remember IE5 having TLS1.0 as an option. Just because it's default not enabled doesn't mean it's "effectively completely unsupported". Browser protocol support matrix here:
http://en.wikipedia.org/wiki/Transport_Layer_Security#Web_br...