Absolutely. I recognize some of the technicians responsible from UNIX groups and mailing lists and I have no reason to doubt their competence.
But the point here is that I can choose which TLD I register my domains under, and trust is not implicitly delegated between them. Even if the .xxx top level domain (as a completely made up example) is run by greedy or incompetent people they can't create a mess for any one else, as opposed to the current CA model where DigiNotar can sign "CN=*.*.com".
That's is not just an implementation detail, it's a fundamental difference.