Of all the developers I've worked with not all use all the big 3 Adobe software titles.
Did some quick stats, % of developers using, based on a few dozen people:
Photoshop - 70%
Obviously Photoshop had the deepest penetration, but 30% who don't use it is a significant number.
Dreamweaver - 30%
No surprise as there are a ton of good (better?) alternatives, everyone who uses a Mac seems to go for Coda/Textmate, and considering there's a high proportion of Mac based developers...
Flash - 5%
No surprise, not that much competition, only a handful of people used it to any extent