That's mostly, but not completely, true.

Connemara Irish whiskey is also peated. It's also a respectable whiskey, but I think you can do better for cheaper with Scotch island whiskies.

For all-out smokey power, the (Texas-made) Balcones Brimstone is a bit of a mind-fuck. It's dried with mesquite wood fire (i.e. the thing used for good bbq). It's not their best whiskey, and it's not well balanced by any means, but it is unique and very, very smokey.

Edit (after walking through the kitchen): Nikka (Japan) and Kavalan (Taiwan) also produce excellent peated whiskies, genuinely competitive with great Scottish whiskies (unlike Connemara, in my opinion), but they wouldn't be any cheaper than Scottish whiskies in the US.

Nikka make some of my favourite whiskeys. Only thing I prefer more is Lark.

Good to know. I'll check them out.