What does a wrench have to do with searching? It's no better than Ctrl+F and filing cabinets. I usually associate wrenches with configuration screens, so that would confuse me. I would assume the find menu under the wrench is to look for configuration options, like the configuration search in Chrome.
Chrome is actually an interesting example, because the UI for find-on-page is identical to the one in iPad Pages - click on a spanner/wrench then on "Find...". It makes even less sense in other applications - "Find" is normally in the "Edit" menu, but finding is quite specifically about reading, not writing. So why in the Edit menu? It makes sense that 90% of people wouldn't be able to find it...
