aFarkas/webshim — comment on commit 8a8021664048f933b19f9626e3fc1071e2f9b6e8
File: src/shims/form-shim-extend.js line 660
By aFarkas:

interesting results:
http://jsperf.com/implicit-label-find-in-ie

All IE browsers do use different techniques to get to those results (IE9 supports matchesSelector, IE8 supports querySelectorAll and IE7 supports nothing)