I've sounded off about how disconcerted I am by the usability flaws in Google Instant, and what experts are saying about its potential impact on SEO and paid search marketing.

But Google has now introduced a simple, little interface change, which I really applaud: A subtle "Instant is on" link that allows easy toggling between Instant (type to search) and the old standard (press Enter to search).

This is a great, unobtrusive design choice that puts control of a crucial preference into the...