1. I'm a fan of the placebo effect. If thinking I'm faster makes me faster, I'm still faster.
2. Tights make me feel faster (maybe the placebo effect). Wearing compression shorts when running gets funny looks, but wearing compression tights, well hell, I guess I still get funny looks. But I still feel faster.
3. I prefer Skins and CEP so far. I have the 2XU calf sleves and recovery socks; CEP calf sleves; Skins tights, bibshorts, and trisuit; some other compression socks. The skins bibshorts and trisuit are my two favorite articles of clothing. I have found the CEP sleves also fit very well.
4. If you want to read more, go over to a tri website. Most posts there end up in a pros/cons argument for/against compression.
5. I find it interesting there are so many discussions over the benefits of compression. I do a lot of things that have no basis, from the stiffness of my soles to the tpi of my tires. If I can waste my money on something cycling related, I probably will.