Would take a hell of a lot of digging to find that critic. Was in (I think) look at your box may 15/16 months ago. He slagged it and mention the vocal being akin to Al Jolson. Pains me to agree, but I know what he means, only in a couple of bits does the vocal sound that way. Al is on youtube singing Mammy if you want a comparison.
Wouldn't say written in stone, he was a lone voice stating that. Deffo Jolson. Will see if I can find offending post.