For what is worth.. since I updated from v46 to v47 I haven't noticed any difference in speed OR in battery consumption (using the same OC settings: LV and 250-850).

In fact, I seriously doubt that a patch here or a patch there (of the kind we're talking about) can provide any of those two effects in any significant manner.

For people reporting these things, as *vi_* has asked, please try to provide further information (e.g. what exactly you did besides updating the kernel) and any logs that may be relevant..