> I'm curious if the wider scientific community accepts that protein raises
> insulin, or is this still controversial?

I don't think that its controversial because protein raises glucagon too.
That's important.

Influence of food on insulin and glucagon (p37, Protein Power)

Type of food                Insulin          Glucagon
carb                                5+                    0+
protein                           2+                    2+
fat                              no change     no change
carb + fat                        4+             no change
protein + fat                    2+                    2+
high protein/low carb     2+                    1+
high carb/low protein     9+                    1+

Rob