AHA! It is NOT a 'special place' but a 'special situation'. And that, Bethesda, is a real big issue that you missed in your scripting. Not everyone will want to start the main quest prior to starting DG. Hell, the MQ is almost the last quest that I start in Skyrim as it is, let alone with Dawnguard. OK, now how far into the MQ does one have to be? All three of my attempts have been after 'Before the Storm' (MQ102) has started. I immediately diverted to Riften and the Dayspring Canyon, as soon as I finished talking with Alvor / Gerdur. Now I wonder how much farther one has to go in the main quest before one gets the dragons... I'll guess 'Dragon Rising' finished.
Maybe I'm jumping to conclusions. How exactly did your friend start his 'dragon-less' game? Alternative start?
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You do not get dragons in the main game you do not get dragons in the DLC, seems fair enough to me. You have to go to a lot of trouble to avoid starting the MQ in Skyrim, and you do not have to go very far in the main quest to get scripted dragons.
If croc is a PC player I would be looking for a mod that is preventing the dragons appearing. Serana mentions thin ice, you take one step on the ice you should get dragons. I had a character who only went as far as talking to the greybeards, she got the dragons. She could get scripted dragons after killing the Whiterun dragon.