I searched and didn't see any post mentioning it here. It's posted in the Shmups.system11 forum, so someone here probably have seen it.
http://shmups.system11.org/viewtopic.php?f=1&t=41475Shooting Gameside is a series of Japanese publications that focus on the past and future of shmup games. In their inaugural issue, they did a round table interview with 5 doujin developers. It's an interesting interview, well worth reading.
EDIT:
For me, the weirdest part about that interview is ZUN denying Cave's influence on him, in a way that sounds to me like saying "I don't like Cave games at all".
Consider the following:
Touhou games contain many danmaku patterns that are inspired by or homage to Cave;
He is reported to be able to enter
the 2nd loop of DoDonPachi Dai-Ou-Jou (White Label);
In the BAIJR interview 5 years prior to the roundtable, he cited Cave games as examples in his discussion of game design philosophy.