I don't see any 5 year old children on these forums, and I don't think it's fair to bash younger folks because they're younger than you, that's arrogant. I've seen more "advlts" complaining about stupid things on these forums. Please don't assume because one's younger they're less intelligent, or mature. Like I said, that's arrogant.
It depends what age you're talking about...after advlthood what you say could be applied, sure, but its simply rational to assume someone 30 years old is more mature than someone who is, say, 12 years old, at least in the vast majority of cases. Nothing arrogant about logic.
And of course, we are all equal, regardless of age. I hate how ageism always has to permeate these kind of discussions. 5, 40, 100 years old - we are ALL equal. No need to bash yourselves because you're not part of the youth crowd, or on the other hand, raise yourself above it...
That being said, it would be a huge step backward if they didn't voice over the entire game. That's just a staple of the industry at this point, and it should be expected of
any game that wishes to enter the running for GotY. I agree with everyone though, that more voice actors, at least one or two for every single race, would be hugely welcome.