I think we're picturing two different routes.
Taking the Garden State Parkway to the NJ Turnpike, there's no view of Phila., and being on the NJ side traveling south towards the DE Memorial Bridge isn't where rush hour traffic is flowing. Rush hour (at 6:30 a.m.) is moving generally East to West through southern NJ towards Philadelphia.
But
without an hour's stop for breakfast somewhere around DE, the driver will catch up to Baltimore/Washington traffic for sure. And, even then, none of this is foolproof!
Goofygirl, I thought you said you wanted to take the Tappan Zee? You will be there in roughly 1 hour to 1 hr 10 minutes...so by about 5:15 a.m. By the time you are off the Tappan Zee, you are basically out of New York State. Then you head to the Garden State Parkway interchange which is about 8? miles West on I-287. You take the Parkway south through NJ to the NJ Turnpike, which will take you right to DE and hook you up with I-95 South. That should take you 2 hrs. 15 min. to 2 hrs. 30 min., roughly.
Hope that helps. Try bing.com/maps. Type in your address to Tappan Zee Bridge. Then add another waypoint being Delaware Memorial Bridge. It'll provide time and mileage for each segment. I have to think google maps would run the same way. But you will need to provide your waypoints.