And Baby Piggy was voiced by a woman, so her voice sounded odd (I'm more used to a man voicing Piggy), but not as odd as Baby Gonzo's girlish voice.
Well, I will say that some of the vocal characterizations sounded closer when they first premired. Baby Gonzo and Baby Rowlf especially. But the voice artists relaxed into their roles.
I always liked Russi's Gonzo voice. It was like a different spin on her Huey, Dewey and Louie in Ducktales. Plus it did have that gonzo squawk sound to it. You know, the voice Gonzo used to have.
I think that they all did a great job vocally caracaturing the Muppet voices as babies. Piggy really was close, dispite the sound difference.