It takes real courage to have told the truth — impressive.
Literal
True [possessive-の] thing [object-を] said [surprise-とは] as-expected courage [subject-が] exists.
さすがに ('as expected, truly, impressively') acknowledges that someone lived up to or exceeded expectations. とは here marks the preceding fact (telling the truth) as the thing being evaluated with admiration. 勇気がある ('has courage') is the predicate.