2000-2500 @ 70 MPH seems about right to me. At 3000 I'm generally showing a tick over 80. It's no secret when my teal reaches TC operating temp because it lugs the engine a bit at low speeds when it hooks up. The silver, I barely notice.
With the car fully warmed, get on a freeway and set the cruise. If the tach reading varies with engine load, I'd say something's up.
dcb
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