Congratulations on the purchase of your Gibson Sheryl Crow Sign. model, simon!
No reason for any worries. That's how Gibson pegheads always have been made, acoustics and electrics alike.
I don't think that any factory employs the technically challenging scarf joint method fixing the head to the neck in the proper angle these days.
You can still see the diamond volute, where the neck turns into head on the back, on some Martin models. No longer necessary and nowadays it's more nostalgia and a "cosmetic" feature.
Enjoy your new guitar - it's a very nice model!
