I have one program ( Reason ) that says they are going to make me upgrade from 10.6.8 to 10.7 if I buy their newest version.
My other commonly used programs/instruments/samplers ( PT10, Logic 9, Play, Omnisphere ) say 10.6.8 is fine. Kontakt tells me 10.7 but I have never had a problem using it in 10.6.
I have heard 10.7 ( and 10.8 ) is/are more of an apple marketing upgrade and media producers are avoiding it as it is resulting in lower performance than 10.6.
I guess my question is if anyone has taken the 10.7 plunge and seen adverse performance in regard to any of their audio processes.