I easily believe those numbers-especially if they include the "electronic payments" made from my bank's website that actually just involve the bank cutting a check and mailing it. I don't actually know how the payment is made in each case but I'm pretty sure that payments to, say, my trash collection company are ultimately via paper check from my bank.

I probably write 2-3 physical checks a month (housekeeper, random other service people, personal payments for various activities) and another 2 to 3 from my bank. And that's with doing all the automatic payments for utilities etc. that I can.