I just activated it today. I signed up last week, it became available this morning, and I activated it as soon as I could. No hesitation. The risks are there, sure, but the risks are there with Paypal, too. It takes time to transfer money from Paypal into a checking account, too, and that doesn't stop people. I'm not worried about transfer time.
I just had a customer this week who needed walked through the process of paying through Paypal with debit because it's complicated, takes a LOT of verification if you haven't done it before, and it can get messy. I love the idea of streamlining it within Etsy. It seems a little more professional, IMHO.
For me it's worth a shot.