Yeah, my client cards have Cirrus/PLUS logos, or at least one of them. I've used my bank card in the US that way.
I never considered CVV1 to be that secure, because all you need is the card to commit the fraud. The signature is practically useless. The CVV2 is the same, because it's ON the card in question. That's why I like Interac so much by comparison, it always requires the PIN. (Well, OK, now it has a tap-thing where you can make small purchases without a PIN.) I have lost my Interac client card so many times I'm on #31 (the temporary replacement card they give you counts, so I've probably actually lost around half of that number) and none of the lost cards has represented a significant security risk as far as I'm aware. I've lost fewer credit cards, but that's a combination of using them less, not having them as long, and worrying about them more (probably in that order), but each one could have been used at a merchant and undoing the damage would have been annoying at best.
Considering the success of Interac in Canada, I don't think there's a GOOD excuse that CCs have taken so long to go PIN, and that chip tech has taken so long to cross the Atlantic. I do hear that US banking's a mess because it is (or was) a Frankenstein patchwork of organizations, but that's not a GOOD excuse :P