even if that was the case, this doesn't make sense. Write a script that adds -o-transform and -moz-transform after every -webkit-transform in your css and you have a good chance that it works.
Regarding mobile browser market share: It is a common misconception that mobile browsers not based on webkit have a negligible market share. Look at this. http://gs.statcounter.com/#mobile_browser-ww-monthly-201010-...