the other 11 still fire up immediately. i do have 1 newer, smaller cfl in a desk lamp, and its a lot "whiter" than the old ones, but both styles work just fine for me
its funny, at the apartments i would take all the regular bulbs out when i moved in and stash them. when i moved back out, i'd swap them all back in. i'd put the cfl's back in the original box, and move them with me.
i've only got about 3 or 4 regular bulbs in the house now. when they go out, i'll buy another "value pack" of cfl's. luckily, my kitchen already has a 4' fluorescent fixture with 2 tubes. just a couple bathroom lights and another desklight are still reg bulbs.
never kept the reg bulbs in long enough (anywhere i lived) to see what i was saving.