I thought that there should have been more rebuttal time allowed. Also, there was some scientific evidence that Ken Ham did not bring up. For instance, since Bill Nye is on a board for Mount St. Helens, I would have liked to see Ken Ham discuss how after the eruption in 3 days a canyon was carved there that is 1/10th of the size of the Grand Canyon. This brings some observational and experiental evidence to the fact that the Grand Canyon may have been formed in much less time than the billions of years that their historical science leads them to believe.
And for the age of the stars there is a fantastic book called "Starlight and Time" written by an astrophysicist named Dr. Russel Humphrey that shows mathematical reasons as to how if the earth is in the position of an "event horizon" we will see the planets as being so far but experience what is only 6 days to us. Most of the book is over my head, but there is science out there that supports a young earth that should not be ignored, but unfortunately it is.
I would not say it is ignored. These things have been looked at and explained. For example the canyon at Mt. St. Hellens was cut through ash. That is very different than cutting through basalt and granite.