Most patents provide implementation details just as an example and often have a disclaimer that basically says all other varying incarnations of the idea is covered by the patent. Yet another reason why most software patents aren't helpful.
Incorrect. The only legally valid part of a patent is in the exact language of the claims. Any other description makes no difference, and anything not laid out precisely in the claims is not covered by the patent. In fact, the body, abstract, description makes no difference - it's only to lay the foundation for the claims themselves.