Yeah Dark Horse is like that with all its manga properties. The only exception I can think of to the delayed release rule would probably be the Gantz series which pretty much comes out regularly every other month. If you wanna talk about huge lengths of time between volume release though try reading MPD Psycho or Kurosagi Corpse Delivery Service. There's at least a 2 year gap between each volume release.
Back from the dead and now 25% less evil
*The following restrictions apply to all coupons unless otherwise noted: Items already heavily discounted (weekly specials, bargain bin items, closeout items, and specialty imports item
s) are excluded from coupon discounts. Orders must be completed through our online store at RightStuf.com. Items that are on special or are excluded from additional discounts do not count toward coupon dollar amount requ
irements. Only one coupon or gift certificate may be applied to each order. Canceling or revising your order may affect its eligibility for the coupon.