I tried in digital forensics. Depends on the project. May get up to 5x speedup in the software that runs, after a lot (a loooooooooot) of complaining by it. Many proejcts didn't manage to run though. In the end, not truly significant speedup (the bottleneck tends to lie somewhere else) for the effort that is required to get everything to work.

PS: I do realize "digital forensics" is probably not the kind of "production environment" you were thinking. Just a small datapoint about a particular branch of software that, while getting good speedups, may not benefit as much as the "X times faster" line would suggest.