Alas it's true. I believe hospitals have a quick turnaround time for their tox results done on site, but they only check for a few substances, and last time i saw a report, it just said 'detected' or 'not detected' and didnt quantify it.
When I was at the OCME, we had a ~6 month turnaround time for toxicology results. In extreme cases it was expeditated, but the backlog was just so overwhelming. The panel checked for many more substances though, and quantified the levels.
I think hospital labs just have the manpower and funding to do their samples much quicker; after all, the labs are built for fast diagnoses. While most people find the postmortem tox delay super frustrating, I guess there's less of a 'push' to tunnel funding towards that.