yes, my copy of AC 23-8:
8) Recovery. Recoveries should consist of throttle reduced to idle, ailerons neutralized, full opposite rudder, followed by forward elevator control as required to get the wing out of stall and recover to level flight. For acrobatic category spins, the manufacturer may establish
additional recovery procedures, provided they show compliance for those procedures with this section.
Not saying that the Pitts has strange spin characteristics at all but one (of several) very good example of the application of the above statement from AC 23-8. Although the hands off method works very well for the Pitts it is not mentioned in the flight manual. S-2A: "For flat spins use aileron with the spin for recovery." - certified before the days of Beggs-Mueller.
I don't see that same statement in my S-2C manual, I must follow up.
To specify the Beggs-Mueller technique these days in such an aeroplane seems very sensible to me. Naturally, the spin tests are done to verify it