I'd love to know how long you should expect for an ACH payment to clear and into your bank account. The two day period for credit cards is so small. Who checks their statements every single day? This is obviously the benefit of using Stripe if you're the merchant, but it leaves you vulnerable.
We can only pray that Stripe accepts some responsibility for verifying these ACH transfers.
Fraud on Stripe is a two-fold problem. They've got fraudsters signing up for Stripe accounts and running cards through them. They've also got fraudsters making purchases on Stripe-based sites. Obviously, Stripe prefers that the charges are made to legitimate users. That way they're not out all the money.
Edit: It appears it could take "up to 5 days" for the payments to be processed. This is entirely on the bank's side of the equation. I guess from there you'll only need to wait your 2 days (7 days for some users) to receive the ACH into your bank account. I see massive fraud coming in here.