Not according the Geneva Bible's notes He isn't.
The Geneva notes for Eph.1:10 state,
14) The Father exhibited and gave Christ, who is the head of all the elect to the world, at that time which was convenient according as he most wisely disposed all times from everlasting(emphasis added). And Christ is he in whom all the elect from the beginning of the world (otherwise wandering and separated from God) are gathered together. And some of these elect were in heaven, when he came into the earth, that is, those who by faith in him to come, were gathered together. And others being found upon the earth were gathered together by him, and the rest are daily gathered together.
http://bible.crosswalk.com/Commentaries/GenevaStudyBible/gen.cgi?book=eph&chapter=001
So what are you claiming that the notes are saying to support the dispensational theory? To me this is only speaking of one time, that is the continuum of time "from everlasting".