I don't think there's anything wrong with citing good modern ministers (even Baptists, gasp!) who teach what the Fathers taught 1600 years ago. Sometimes a contemporary minister can communicate effectively in such a way which the same ideas by the Fathers will lose people, just due to the style of speech.
Good teachers of all eras are worthy of study and quotation.
(I know though that quoting the Fathers is to the Orthodox what quoting scripture is to Protestants...so we'll agreeably disagree, I'm sure...)
Oh, I don't see anything wrong at all with quoting the Baptist preacher. The preacher is right. I was just surprised that an Anglican would do that rather than quote one of the Fathers, a surprise likely born of my childhood image that the Episcopalians were "sort of English Orthodox" and as you say, we Orthodox are fond of quoting the Fathers.