User blog comment:Xilinoc/Ch. 571 (Yachiru's gonna wreck it)/@comment-11446176-20140305130913/@comment-11446176-20140306033325

Thing is though - He's basically using the same Asauchi he picked up ages ago as a child. The form is the same, his saying it is constant release could also stem from him not understanding it in the first place, kinda like what Ichigo said when he mentioned his power was always flowing at full way back when he faced that first menos.

Yes, Kubo might have said it in an interview, but I'd still like to think its infallible...

Still, open to both things being possible. We'll know for sure once Ken-chan reveals the name of his sword...