Now that is interesting. I can only think of one Filipino restaurant outside the Philippines - it is in Hong Kong and has been run by the same family for many years.
In the Philippines, "Illustrado" in Intramuros is a pretty good place for good filipino food but again I struggle to think of other restaurants which serve filipino dishes with a white cloth on the table...
There has been an assumption that filipino cuisine is for poor people - fatty, greasy food with simple, overpowering, flavours.
Personally, I like the characteristic "sour" taste of dishes like sinigang, and I can see that they could suceed internationally if made with greater care.
Good luck to Rolando Laudico