Advertise One Feed Format
Nelson Minar starts a meme. Rafe Colburn waters it down. I’ve watered it down even further.
Whatever you call your feed, Safari will call it RSS. Don’t sweat the small stuff.
Which format should you pick? I’d suggest that you pick whichever one that you can consistently produce with the fewest errors and warnings detected by the feedvalidator. Test with Iñtërnâtiônàlizætiøn and ampersands in titles. June, particularly in the UK is also a good time to test.