I know about this very well... The Armenians of Lebanon and Syria that are 30 years old or more speak Turkish, including my parents here and my relatives there (they try to hide their knowledge of Turkish, but I know)
You might also want to know that Turkish channels are available there. Some of my relatives in Lebanon, especially my grandmother buy turkish CDs and watch turkish shows. There isn't this problem with the younger generations.
If you hear Turkish music in the streets of Bourdj Hammoud, you would know that the driver is Armenian... Some Lebanese and Syrian Armenians probably don't even know what ''rabiz'' is!