If it holds through independent scrutiny, absolutely, as AMD made basic architectural changes that should negatively affect IPC at the same time.
Of course, right now we're taking AMD's word for it. If they wanted us to be sure, they could have delivered a set of review units to GamersNexus in a hotel room at let Steve at 'em.
When exactly would Steve, or any reviewer, have time to benchmark during a trade show? They’d have to lock the GN team in a hotel room for days in order for them to get quality data.