Usually people are saying the US has too many specialists, except for certain lower-paying specialties like obgyn.
I've never had a problem with delays in large metro areas in california. I do recall hearing Boston was the worst big city to find a new doctor, supposedly due to Massachusetts' push have universal coverage.
My mom lives in the DFW area and makes $50k. Within the past 5 weeks she's gone for a routine mammogram screening, seen a specialist about a grown that thankfully was benign, and been seen by a surgeon who removed the growth to be on the safe side because my mom is considered high risk.