@vince42 Above your speed dials there is a search box, unless you have hidden it in settings.
That's the search engine used by instant search.
Yes, disabled that right from the beginning. Why would I need (and waste space for) two search boxes?
And the main question remains unanswered: why would one want different search engine in different search boxes? Especially when there is no way to customize them?
Call me crazy, but I think most users would be quite happy, if they would choose one default search engine and the setting would be applied throughout the application.