It's not excessive; at least to me it's not. However most people are not used to hearing any sub bass and if they do, not very much in quantity, so it may seem excessive to those; especially if they prefer an analytical sound signature. Atrios have sub bass in spades but to me is never intrusive and never bleeds into the midrange.
Seems like I'll like them. May be later on... Sigh! collecting IEMs never ends. But EX-1000 (after price drop) first .