I live in Springfield, Massachusetts, as you can see from my label at the top. More often than not, the signs I've seen call them a rotary here in the United States. I've drive all over the US from Massachusetts to California and back over the northern I-80 route and the southern I-40/I-46 (old Route 66) route... and it's been called a rotary every time I've looked. Regionally, they're more often than not called a 'rotary' here in the US, despite the word you and your acquaintances prefer to use--which isn't incorrect (I'm sure it's used), but to say that there's 'none of this rotary business' is not just inaccurate but very wrong. :P

Also! Almost literally in my back yard (I live just over the border into Springfield next to East Longmeadow) is one of the most famous and dangerous rotaries in the country. http://en.wikipedia.org/wiki/East_Lo..._Massachusetts