lucky b*stards getting away with that! If the F/O hadn't realised and selected flaps 5 they would all be dead.
I've thought about what I'd do if I rotated without flaps and got stick shaker. Think I'd select flap 1 as this would cause the LE flaps to extend and the LE slats would go to full extend close to the stall. There's not much difference between flaps 1 and 5, it would give the least trim change, and it's quick to just slam the flap lever into the flap 1 gate. At the same time I'd firewall the thrust levers and lower the nose until the stick shake went away. It would be messy but guess if you're quick then you can get away with it with just a change of underwear!
And I was taught to check the 'triangle' as you line up, of A/T in the top left FMA, the eyebrows, and the FD in the top right FMA. Got the eyebrows and you've got flaps!