I am sure. At least in Germany the respective privacy protection agencies (federal system so multiple agencies have their say) already stated, the "pure" analytics and "pure" advertising is ok without opt-in, only an opt-out needs to be provided.

If you do linking of such stuff (like Google Analytics with DoubleClick) you need an opt-in. Only then the opt in cookie banner is really necessary.

Please excuse the late answer - was on holiday.