I've gotten a chance to play with the mobile-friendly search pages. They seem to work well enough on my devices.
However, the integration with the home page is inconsistent and an issue.
I have two devices, a Nexus7 & a HTC EVO LTE, both running Jellybean. Getting to Search is OK on both from the "menu" icon, but the bars at the bottom of the page do not respond on the HTC, even though they show like they are clickable. Search, shoebox, and others don't go anywhere. On the Nexus it works OK.
I still strongly request that we be given the option to opt out of the mobile display pages, as each device is different and the user should have the choice.!