I have been in many recording studios on the west coast, the best one I have ever been to was at Skywalker Ranch. I concure, several small studios I have been in mostly in peoples houses don't have very good playback systems, there recordings often reflect this. It is to bad that there isn't a standard for recording studios similar to the THX standard used in movies. I remember several years back working at a small studio, one thing they did for suplimental income was by doing small recordings and personal projects, Im glad there are inexpensive studios out there. The playback system in my house revialed the one at the studio but you could still do a reasonable recording. I am always looking for the best recordings I can get, I know that no matter what system I have its sound quality will never excede the recording. So my answere to your question is ( my opinion) that my playback system in my house should and does reveal more than what is installed in most small studios. One of the cons to this is a bad CD or LP sounds really bad and you can hear the limitations of the recording but when you get a good recording it is magic.
What about "Pro" vs. Audiophile ?????
In all my years as an "audiophile" I've often wondered why spend all the time/money, researching/buying gear that MUST be far superior to anything in any recording studio? Is this pursuit really worth it or should we all be trying to recreate what the studio engineer was listening to when doing the final mix ?