I know the title is a bit weird so let me explain. I usually use Photoshop for my GIF work, such as my current avatar. The problem I've always had is that GIFs I make in Photoshop run slowly in any browser. They run just fine in Photoshop, I have the delay between frames set to 0 seconds, yet they still run slowly in browsers. I have tried so many programs to try and remedy this problem and none have helped.
I've seen smooth-running GIFs made with Photoshop though, so I think I'm doing something wrong, I just don't know what it is. Before you ask, no, I have not yet tried GIMP; I would try it right now but I can't install it on school computers and I don't get home until around 5:30 because of work.
What do you guys use to make your GIFs? Websites that place watermarks in the GIF such as gifsoup are unacceptable.