Certainly it is impossible to reliably say more than 5 days out whether Bertha will strike the Carolinas - or anywhere else for that matter. The Accuweather forecast, in terms of projected track, doesn't come as a shock to me, but the speed is too fast, when I look at the model outputs and the NHC forecast.
I expected more of a poleward motion to have begun over the weekend, but it hasn't, so I'm not sold on the storm getting caught up in the trough just yet.

Edit: I just looked back at the advisory archives. In the initial 5-day forecast, the 72HR line read:
72HR VT 06/0600Z 17.5N 40.0W 45 KT
at 06/1500z, Bertha's actual location was 17.4 N...45.1 W. 45 KT

So I guess as far as poleward motion, it's on target based upon the 72 hour forecast, but it's 300nm west of the projected location. Did I do that math right?