No he's not, actually. I revived an old thread because I didn't want to start a new one with the same topic. His post is from March.
...Huh. Somehow I thought this was an older thread. Well, good move on your part.
Well, the question if it fits within the whole system/philosophy is debatable, but surely - exporting it would make both sides happy.
Could I fiddle with it in the following manner: I use the "Lazy Newb Pack" and it has the Fort Cap Limit as one of the variables (default: 200). Let's say I'm currently at 50 dwarves, could I set the cap to, let's say - 60 before loading the game for the next time. Than, after I get immigrants up to 60, I save - exit - change the cap to 70 and so on. In this slightly time consuming way one could have a fine control over the migrant influx. Is this possible, or does this variable influence only newly started forts?
Two things that come to mind which would be issues are the fact that some play multiple forts at once and that popcap either stops or allows a whole migrant wave at a time. So...no, it wouldn't.