What I'm looking for is information concerning whether or not the title tag in an image link has any added SEO benefit over the alt text. I've always used both, but have never tested one versus the other. It is widely believed that search engines look at the alt text of the image as somewhat equivalent to the anchor text of a hyperlink. Is it the same for the title tag? Can the title tag carry more weight?
Obviously, I could test this, but before I spend my time doing that I was hoping that maybe someone already has or can point me to an article about someone who has.
I know that Google has let it be known that alt text is looked at by their crawlers, but Google is also not always entirely upfront with their information and conveniently leaves out additional information that could be beneficial to anyone hoping to get better rankings. Everything I can find from them about title tags in images seems to indicate their search engine is pretty indifferent towards them, but that doesn't mean it is true.
Anyhow, if anyone has any solid information on this, I would appreciate it.
I'm not looking for opinions. I could care less what your opinion is about the topic. Solid facts please. I did this... and got this...