I don't believe for a minute that Apple is any more open than they are legally required to be... You would be right to point out that Gruber was mistaken in sa

I don't believe for a minute that Apple is any more open than they are legally required to be... You would be right to point out that Gruber was mistaken in saying KHTML is BSD-licensed, but the rest is demonstrably false. They were legally required to open source WebCore, derived from KHTML, because it is LGPL. And they did so, as soon as Safari was announced. They were not legally required to release WebKit, which is BSD. That release came several years later, and is certainly a more significant project than KTHML or WebCore alone are.