look up this book in google http://www.uesp.net/wiki/Oblivion:The_Armorer type oblivon or elder scrolls after it, its a good read for would be smiths. i cant add a working hyperlink for some reason
Orcs have the most smiths per 100 population
Dunmer smiths do extensive work with ebony which is one of the hardest metals to work with
Most refrenses of Smiths making Daedric weapons/armor is by/for imperials
The most amazing/destructive blades were most likely made by Redguards
Nords are renowned for making masterworks out of common steel
because of such mixed lore i am guessing no one will get a significant boost to smithing, because everyone can say they are the best and point to a book or npc statement. If they do give anybody a small bonus my money is on orcs and nords.