From
Jetblue's contract of carriage:
If a Passenger’s travel is disrupted due to a Controllable Irregularity and the Passenger experiences a Departure Delay of six (6) of more hours, Carrier may, upon request from the Passenger, provide the following amenities: meal vouchers and/or a hotel voucher.
In short, they do make mention of a "meal voucher", but the "and/or" along with "hotel voucher" does gives them some wiggle room. It probably just depends on how much you push. At best you'll likely get a $25 meal voucher (per person), so it comes down to how much you value your time and how much time you have on your hands to pester them about it.
