I agree - just to add to this; Aikido is not a mish-mash of random techniques from other schools and neither is it 99% Daito ryu. The influence of Takeda is there, just like the influence of Deguchi is there. But Aikido is of itself a completely authentique art.
Interesting discussion of that here
I suppose that it depends upon what you mean by "authentique", and where you think that things diverge.