Having a "stink" is right. Even without much thought, it's off-putting, does not sound professional and really icky. When you think a bit harder, it's just kinda awful. I do actually suspect the name does have some measurable impact on adoption. Most people don't want to say "I gave up photoshop, I use gimp." outside of hardcore linux circles and since then, it has gone from the only open source gig in town to just one of many alternatives.