No, just as Australia would not have been if they had got that extra two runs in Adelaide in the 92/93 series against the West Indies. If England win the series and continue to beat other teams while Australia start losing though, of course. And, failing that, if England win this series and both teams continue to dominate, and then England manage to win (or at least draw, depending on the circumstances) the next Ashes, then yes. You really have to show consistent superior results, or prove superiority in direct competition over several series.
Certainly though, if England win the series convincingly, it's going to be mighty close. There's also a difference between England scraping through 3-2 in a thriller and rolling on for a comfortable 4-1 win. We'll have to wait and see.