well my assumption was that the attach image button is just basically a reminder of syntax -- most people attaching images regularly wont be using that button.
I disagree. It's easier to click that button a few times than have to manually type [attachthumb=#]
five times. In the past, I pretty much always used the dropdown menu to get the text in the text area at least once, then I might just copy and paste it the remaining time.
But yeah, I used that button/menu a lot.
EDIT: Oh hey, I just noticed the links down by the "Choose File" button that will automatically add the text for me. OK. I'm satisfied now.