I've started using Chase Billpay to send EFT/ACH payments.
As an interesting experiment, I wanted to see how a physical check was handled, as our local town's utility is not setup for ACH payment. So, I sent a small payment to myself as a test.
Interestly, the transaction came across today via Quicken download as "cleared" when the check was mailed, and not when the check will be future deposited.... if ever. That was a surprise.
It would appear that ALL Chase Billpay transactions are treated the same as to when funds are withdrawn from the account, regardless of how they might be delivered. The scary part is, of course, what happens to that physical check.