That would sound pretty cool....Is there a source for that claim?
Count is being sarcastic (), but yes, the voice was pitch-altered because Baird wanted to emphasize Worf being an alien. Which, as Count suggests, is a weird thing to do after 11 years of TV adventures where Worf was already considered sufficiently alien without voice alteration.
We should count our lucky stars that Baird didn't pitch alter all Geordi's dialogue too (his having mistaken the character for being an alien -- yes, really.)
Now I want to hear Geordi with Morgan Freeman's voice.