I use a collection of sites and list the stats on my blog,
MD Salaries.
The problem with stats of average salary is that none are well representative. Just looking at psychiatry (my field), you are way off.
The average starting salary in academics is about $145,000. This is usually for a pretty relaxing gig supervising residents and having "administrative time".
State gigs in Texas average about $185,000 with no call, no holidays, and vacation time.
The average
starting salary in private practice is about $215,000 (your 75%ile). Many of our residents start higher than this while only working 45 hours/week with little call.
If you are willing to take call, work longer than 45 hours/week, run a clinic, have PA's, be fellowship trained, or any number of other opportunities, you can blow well past $350k/year.
It is hard to explain "average salaries" when the original poster doesn't explain what venue he/she wants to work in, how many hours, etc. Not to mention that busier, more successful physicians do not participate in salary surveys because they are busy making $$$$$$.
Asking about an "average salary" in any given field is about as easy to accurately answer as the question - "How many F-150 trucks will I see today". You don't know if I'm watching a Harry Potter marathon in California or going on a roadtrip in Texas, so how will you accurately assess how many F-150 trucks I will see without giving you details?