Sorry but review is more about Relapse than Black Tusk.
Black Tusk's Taste of Sin is a pretty strong record. And yes, it does has it's moments of early Mastodon and also Baroness as they are all part of the surprising metal scene that shot up in Georgia a couple years back. Their riffs are pretty strong, the vocals are deep and throaty, and drums are thick and heavy. I highly recommend checking them out.
Now about Relapse, clearly these guys are really searching for another golden cow, now that Mastodon has pretty much left the stable. It seems that almost every release by them bears the label "For fans of Mastodon", "If you like Mastodon.....", "Sounds of early of Mastodon" and as a result it can have a negative impact on how people react to a band. Black Tusk's case, yes you hear that Mastodon is an influence but I've had many of my friends bitch about how they don't sound like them at all and follow with "they suck." Which if I was in such a band, I would be a little pissed. They have been pulling the same crap with Baroness since the beginning but I gotta tell you they more remind me of a metal version of Fugazi than anything related to Mastodon.
Also with all the attention put on finding another Mastodon, it's hurting other bands on the label. Case in Jucifer's Throned in Blood, I have yet to find a local record store (in Austin!) that carries it in stock. The last time I had it looked up it was on back order and not from the distributor but from Relapse (yes I realize that Jucifer has their own imprint but Relapse is still the one that releases it). Really Relapse? Are we printing 5 copies at time because it won't sell as much cause you can't put Mastodon somewhere on the little stupid cardboard spine? Well you could, you could say "Before there was Mastodon, there was Jucifer." I like Mastodon (for the most part - Crack The Skye was ok, but didn't really ROCK!, more like Rock: Technically Speaking) and I've been longtime fan of Relapse since the Dead World days, but giving bands that are just starting out like Black Tusk such a unfair comparison can be detrimental to their future development, IMHO.