Call it the birth of Citichovia. In another day of Wall Street’s epic saga, news came today that Citigroup will acquire Wachovia’s banking operations for $2.1 billion in stock and will assume another $53 billion in Wachovia debt. Which leaves Wachovia customers scratching their heads, as Washington Mutual customers were last week. But there’s a big difference between the Wachovia and WaMu dealings — time.