I think the point is that even if you have a card with an EMV chip and a PIN to validate credit transactions, if it is issued in the US, you likely will still be asked for a signature as opposed to a PIN.
The first issue is your card and how the Card Validation Method (CVM) is structured. Your card has several methods arranged in a priority. As an example, your card may have "signature", "Online PIN", "Offline Pin", and "None" as the methods, in that order of priority.
Secondly, the terminal in which you make the transaction makes a difference. If in the above example, it can accept signatures, you will be asked for a signature, even if it is capable of taking a PIN. If it cannot accept signatures, then you will be asked for your PIN, and in some cases, for low dollar transactions, it may not even bother with a validation (the "none" option)
Nearly all "Chip and PIN" cards issued in the US still have "signature" as the top CVM, so there is a pretty good chance that in Europe, you will be asked for a signature with a Chip and PIN card.
The good news though is that just having the chip makes transactions easier, and whether your are then asked for either a signature or PIN is really of no concern. The Benefit comes when no signature is possible (Railroad ticket kiosk, gas pump, etc) and the amount is above what the "none" CVM allows, then you will need the PIN.
So far as asking your card issuer what the priority is, or having them jumble the priority, the word in forums is don't waste your time; and really, as long as you know you have a PIN, it really does not matter.