CA (Creative Assembly) who are developing the game have confirmed they will send out for pre-loads so i kinda expect it but then again, i am buying a key and not the actual product from Steam so yes you are correct, i should hold my horses.

Update. Greenmangaming has started sending out keys for pre-loads. I am not saying to buy it from their site though because Gamesplanet combined with the discount is much cheaper. I'm just letting people know about it. You can not pre-load the game yet but CA will give a date when we can before this week is over. Kinda strange GMG is sending out keys so soon but good for them. I'm almost certain Gamesplanet will send out too when they get the greenlight.