IE is faster than the rest.
-- Microsoft
If you're about to publish such numbers, at least have an external party publish it, paid or otherwise. 30% faster loading would be astounding, especially on connections with high ping times and more than 1 percent of packet loss (3 percent is really noticeable and yet common in lots of places, especially public ones). But of course they didn't mean 30 overall improvement, just the Javascript got 30 percent faster if you use certain things, right? Let's click that link....
> IE11 Release Preview is 9% faster than IE10
Alright so there goes the "30% faster than other browsers". Unless you don't count IE10 as a browser. Also IE10 is way slower in all sorts of benchmarks compared to other browsers.
To take just one recent benchmark: http://www.tomshardware.com/reviews/chrome-27-firefox-21-ope...
Here IE10 is 257% slower than the fastest browser 379pts vs 974pts). If IE11 is 9% faster, then how is it "30% faster than other browsers"? A 9% improvement is still 248% slower than Firefox, at least in Tom's Hardware's benchmark. Or is "other browsers" not "all other browsers?" Perhaps that is their reasoning: "we meant only Opera, Maxthon and $other_unknown_browser as 'other browsers'."