An emerging composer is seeking to have some of their work performed by a smallish professional orchestra (i.e. not something like the Boston Symphony, but a fairly well-known regional symphony). The composer was introduced to the conductor through a well-respected mutual acquaintance. The conductor has most likely not heard of the composer before the introduction. Following the introduction, the conductor responded to the composer and asked for a sample of work. Assuming that the composer dutifully provided the requested materials in a prompt and professional manner, how long is it appropriate for the composer to wait before following up?
Obviously, they could wait forever and still never get a response, forgotten along with all the other composers who solicited that conductor that month, where a quick follow-up might have helped. But also obvious is the fact that the composer could nag the conductor and spoil the nice introduction. This would earn them a quick "no thanks" just for being a pain.
So, what is the appropriate interval to wait?
EDIT: By emerging composer, let's assume that the composer has been commissioned for several pieces and won a handful of minor contests. Their work has been performed by a few professional ensembles, but mostly by local, amateur groups.