Just for reference's sake this does vary a fair bit by computer and browser - mine never drops below ~8kIPS and runs mostly at ~15kIPS (and up to ~23kIPS).
Whilst this is nothing like the several orders of magnitude required for more capable interactive behaviour, it does make my load times noticeably faster than those claimed on the page. :)
For reference, that's about as fast as a Motorola 68030 @50MHz [1] which was used in the AppleIIx, and while that was no slouch when it was released, you wouldn't want to run a modern development environment on such a machine either ;)
Whilst this is nothing like the several orders of magnitude required for more capable interactive behaviour, it does make my load times noticeably faster than those claimed on the page. :)
(I'm Chrome on Linux, i7 4th Gen, incidentally)