I think you understand correctly. It specifically affects theories that involve separations of materials, as the article says. The actual age of the solar system is pretty well established. For instance rock ages on earth are measured by looking at Uranium and its decay products. These half-lives are quite accurately known and not in question.
This makes my head hurt.
Doesn't General Relativity predict that any clock in a gravitational field will run slow? Thus, any clock in the vicinity of the big bang will run slow?
How's anything going to get done if it takes forever for a clock to tick? To an observer external to this nearly infinite gravitational field, isn't it going to appear that nothing happens for a very long time?
When it is stated that the universe is, say, twenty billion years old, just whose clock are they using? Are there any Freeper cosmologists who can summarize twenty billion years for me?