It depends on the person.
Sometimes 'new to massage' means they are brand new to the adult industry, other times they are transitioning from another field (dancing, SP) where they are already comfortable with the nature of the business.
I have only had one 'new' experience that was so-so, and I chalk that up to lack of training. Fortunately most of the reputable spas (AT/PS, CMJ, Brass etc) now have pretty good training programs in place, so even though they are new they have been trained in the basics of what is expected in a session for that location. So you should be safe at one of those locations even if they are 'new to massage'.
Also, keep in mind that each MA is different. Reviews vary even among the seasoned veterans.