Recently emailed two well known, well reviewed, providers.  Got almost identical lengthy initial responses from each...literally nearly word for word. Are providers using templates now or is this suspicious?

Are they two providers from the same agency?  If independent ladies, maybe they use the same scheduling person?

These are independant providers with no discernible association that I know of, except they are in the same city.

Find someone else.

It is odd.  They may be friends or know each other...  or have copied it off some common source.  If they otherwise reviews to be considered well reviewed, I'd PM a couple of the most recent reviewers to be sure they are legit.  If it still bothers you, then just pass on them.
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Sounds to me like they are either A) One of those agencies that tries to pretend their women are independent or B) Both ladies are independent but use the same screener/scheduler.

If they both have numerous reviews and the reviews are good ones, chanes are the duplicated e-mails aren't necessarily a red flag.

You said the replies were lengthy, and I'm thinking it's not even sensible to send a lengthy reply, so it suggests to me they're using the same/similar form letter.