Since I read this I've been having vague memories of people saying it that way when I was a kid. I might just start saying it the old way from now on just because... Digressing a wee bit, so apologies, but I think it's a lost cause, like sorbet. Everyone thinks sorbet's a French word so pronounces it 'sorbay' but it's from the same Farsi word as sherbet and the ending should sound like sherbet.