There's definitely a late adopter/early adopter divide here.

I have found myself wondering what good examples there are of successful (Ready Fire Aim) early-draft-standard adoption on the web. CSS in early Internet Explorer is one of them -- that was a choice that ended a ridiculous, unworkable not-invented-here adventure at Netscape.

But on the flip side, I am reminded of (Google) Gears, which was promoted as a solution but was really only a technology demonstrator for the idea that ultimately surfaced as Web Workers.