I have to a certain extent. I've had French, Italian, Swiss, Corsican, Belgian, Dutch, British and Fijian food in those homelands. Then again, the best food I've had from those cuisines wasn't necessarily over there. For instance, to my recollection, the best Italian food I ever had was in London, not Italy.
I had oddly enough just been in several countries in Europe including Italy and returned to my "base" of London for a few days before flying back to the US. And the Italian meal I had in London was better than anything I had in Italy because it was made by one of the top Italian chefs. I could go on and on I guess. The best calamari I ever had wasn't in Italy either, it was in Boston, in the North End, which is the "Little Italy" of Boston. The best pizza I ever had wasn't in Italy either. I'd say I've had better pizza in both the US and France than in Italy. The Italians don't really take pizza seriously, it's just a snack for them basically.
I've had Indian food in several countries like the US, Fiji (where Indians were once a majority, and are still a large minority), UK and France, but I haven't traveled to India yet. It very well may be the case that you can find Indian food that's just as good there as you can find in the homeland. Or it may not be, but it wouldn't surprise me. I think the best Chinese food I ever had was in Amsterdam, but I've also had it in several countries, just not China yet. There are more authentic Chinese places where I live now (Boston), not just Americanized Chinese, because there are more recent immigrants and students from China and we have a large Chinese population.