ID and the Age of the Earth
ID's position on the age of the Earth is that it all depends on HOW the Earth was formed. That is key because we know that intelligent agencies can speed up processes- just look at manmade diamonds.
Now there are some who will complain that when one speeds up some processes there will be heat generated, for example from rapid rad decay. These people want to know where the heat went.
First we would have to know how much heat they are talking about and the verification of that. Then I would tell them to look at the Earth's core. IOW any heat generated by rapid decay could have been transeferred to the core. An inteligent designer would know that the core requires heat to stay molten so it can provide a proper magnetic field along with plate tectonic recycling.
So the bottom line is when someone tells you that the Earth is 4.5 byo, all they are really doing is telling you the speculation based on the assumption (that the Earth was not intelligently designed).