S.J.
So, I think the question still remains - is the tip still included? I think given the receptionist's answer, it is, but others want to tip MORE. I think you are OK not to tip more, so long as your stylist is STILL getting a tip just as she was before, when it was included in the price.
I could author the book "Confessions of an over-tipper" - so if I am saying you are OK, you probably are. =)