They are. I picked up 3 groups of them and tossed them all together. They took to food extremely quick (not so much on the gel food that DD sends along, but on stuff like frozen cyclopeeze). Eventually sold off that group to a buddy of mine and the last time that I spoke to him, they were still nice and fat.
I ended up picking some up from a different source instead (local, so no shipping), but it took that group nearly a full month before they transitioned over to pellet diet.