I had a license when I got a slot, so no I'm not one who got a slot w/o a license, but I know countless people do/did.
And that's exactly why I said this a couple posts ago..."but if you can finish up in 10 hrs or so, just get it done. Plus, the more hours you get, the more "air sense" you'll have...it can only help you."
I very much agree you should get a PPL if at all possible. I think it can help some especially who may not make it through IFS w/o prior flying experience. However, it is still incorrect to make it sound like a PPL is going to make a difference when getting a slot. If there's any difference at all, it's minimal. Now actual flight time does make a difference. I strongly doubt any CC will rank a dude w/ 45 hrs and a PPL over a dude w/ 45 hrs and no PPL just b/c the first guy has a license.