Every evening, my ten-week old is given his bottle at 8pm and put down in his cot. Over the next half an hour, he'll 'shout out' (not really crying) 4 or 5 times. DH and I take turns going in and stroking his head a bit to calm him down then leaving and, after the fiftth-or-so time, he'll drop off to sleep.
He's a great sleeper - only wakes for one night feed (FF) - and goes straight back down after it.
The shouting out thing is no bother, but I'm in two minds about whether we are doing the right thing in going to him. Part of me thinks that I want him to be completely confident that we'll always be there the second he needs us, but part of me worries that he's just testing us - after all, there's nothing wrong when he shouts - and that he is learning that by crying out he can get whatever he wants ... does that make sense? I mean, what if he starts doing it for longer periods of time, or starts doing it after his night feed - things could get much more difficult for us.
He's too little to be "testing" you. If he's shouting in an "I need you" way, you need to go in to him. However if he is just shouting because he's found his voice and is testing out his new skill of making shouty noises (i.e. doesn't in any way want / need you and is quite happy), you might be creating a habit by rushing in. If you can't tell the difference I personally would err on the side of caution and go - he's still very tiny.