Things like bug count and time to market seem difficult to separate from having more experience as a developer or knowing your problem space better. We use alm

Things like bug count and time to market seem difficult to separate from having more experience as a developer or knowing your problem space better. We use almost all Java, and we have several projects that we did major re-designs of in the same language, which increased maintainability, found bugs, etc. But if I chose a different language, I would have probably attributed it to the new language or framework. Unless you have a problem that fits a specific technology really well, my experience is that your time to market will be minimized by using the tools you know best.