I saw the f/4, and the IS, and wondered what Canon was doing. Then the press released mentioned the 6D, and I saw the price, and it clicked.
It seems Canon watches what I browse used on Adorama. They announce budget replacement versions of things I look at, the very next day. Unlike the 1Ds2 / 6D fiasco, I didn't hit buy last night. This seems to happen every time I visit Adorama, so this shouldn't have surprised me. I'm in the market for a full-frame compatible general purpose zoom. I was on Adorama last night, seeing what was available. I was, once again, looking at used because I'm on a budget. It seems, once again, I am Canon's target market, in terms of timing, budget, and product description. I want sharp and cheap. I guess, if I must, I'll sacrifice a bit of aperture to get it.
I'm not sure how I feel about being a budget-minded enthusiast product category, but it appears that's what I am.
I've tried the 24-105mm on crop before, and wasn't always impressed with the results. Whether it was my copy, or the 24-105mm in general, I don't know, but I wasn't intending to try again. So, while the 24-105mm lens may be cheaper, and it may be Bryan's "If I can only have one lens, this is it" lens, it's not for me. The fact that it was an f/4 lens, or an f/4 on a crop body, can't be what I didn't like, as I think the 70-300L performs well. (Note, the 70-300L is a budget-minded enthusiast product).
So my choices were the super expensive 24-70 II, the sharp, but not super sharp, and often has issues 24-70 I, or more primes. Well, I decided against having pure primes in the general purpose range. I toyed with the idea of the used 20-35mm f/2.8, but decided it was too small of a range for the price. And old.
Hmmm. What to buy. I sleep, wake up, and Canon has an answer. (Seriously, should I be concerned that Canon is cyber-stalking me?!?)
If this lens is super sharp, and not as insanely expensive as the other current sharp full-frame compatible lenses, then I might end up with this lens. And that saddens me a bit.