The Association for Recorded Sound Collections has released A Study of Embedded Metadata Support in Audio Recording Software: Summary of Findings and Conclusions.
Here's an excerpt:
In 2010, the ARSC Technical Committee (TC) completed a study of support for embedded metadata within and across a variety of audio recording software applications. The study was coordinated, and much of it carried out, by AudioVisual Preservation Solutions. This work addressed two primary questions: How well does embedded metadata persist, and is its integrity maintained, within any given file as it is handled by various applications over time? How well is embedded metadata handled during the process of creating a derivative?