Originally Posted by
moondog
I believe only Chinese consulates in the US have to issue ten years by default to US citizens, but HK also works, and probably some others do as well. If you call your preferred consulate, presumably someone will be able to give you a clear answer.
Can answer my own question for the Frankfurt Visa Centre : yes, they will issue by default, 10 year L visas for US passport holders.
Visas in general cost
double for US passport holders than for Schengen passport holders, but to get it for 10 years makes it more worthwhile.