how early is too early?

How early is too early to start looking at dresses and bridesmaid dresses? I posted on the main board and people seemed to think I am looking at dresses WAY too early. I'm getting married in a little over 12 months.

I thought wedding dresses can take up to 8 months to come in? I found what I think is my dress, but plan to order it when I'm home from med school over Thanksgiving break. Is this really that early? My aunt thinks I'm cutting things close. I'd rather have the dress in early than late.

What about bridesmaid dresses? Is it too early to choose them now? My bridesmaids found a dress they like and some have gotten measured, so I was hoping to get that ordered in the next month or so too.

Am I early? late? on target? How far in advance did you do these things or do you plan to?