Okay, I got frustrated with Safari, so I switched to Firefox. Here's why.
Gmail just got slower and slower in Safari as Google added more features to it. Since I use Gmail heavily, I needed to solve this problem. I found a solution here but in the course of looking for a workaround, I started using FF again and the FF habit came back.
Anyway. I was a heavy FF user (something carried over from my Windoze days), testing the Safari waters slowly. When Safari 3 came out, I was impressed. Safari loaded faster than FF.
However, I noticed that in the long run, Safari slowed down in some websites I used heavily (like the BBC website), while FF performed well.
So now I'm waiting for Safari to catch up. I like Safari because it has better bookmarking features, allows private browsing and has generally a simpler and easier to use interface. But if it continues to drag my surfing down, then FF is just a click away.