Yes, they are, and it's a huge advantage to be there when they open first thing, even if you have FOTL.
On Thursday 07/07/05, they opened at 08:30am.
On Friday 07/08/05 they opened at 08:45am.
If you take your front seat ride on Hulk, then high tail it back to Pteranondon Flyers, you can get a few rides without getting out of your seat before the kid rule goes into effect.
The other advantage, is the park is quiet, and the sun is just coming up. After a few hours, things heat up, and you'll want to head back to your hotel room.