DS is 2.5. He went to nursery/creche a few times a week until we moved back to the States from the UK in May. The nursery staff were never worried about his lack of speech (he'd make lots of noise but no proper words and hit his other milestones within the average timeframes) and I tried not to worry about it too much. Upon getting settled back in Stateside, I took him for a well child checkup and the doctor was appalled at his lack of speech, wanted his hearing tested (it had been several times in the UK - had a bit of glue ear that resolved itself) and immediately put into speech therapy.
He went for his initial speech assessment a few weeks ago and it's pretty much as we suspected. He's very far behind in speech (tested at 1.7 years) but ahead in comprehension (tested at 2.9 years). We've been going 3 times/week for 1/2 hour sessions since then.
What I'm trying to figure out is generally when does it start to make a difference? He's got about 6 words now (one he just got last week) the others he had before he started therapy. There hasn't been tons of feedback - what I get is in the waiting room which is filled with people and there's only a minute or two between appointments. They suggested today that we work at home on getting him to make faces so that his mouth is in the right position to make different sounds. He is clearly getting more and more frustrated that he can't talk - a few nights ago he desperately wanted to tell me something about the windows (I think) and there was furious pointing, grunting and other sounds but nothing comprehensible. It went on for about 5 minutes (until he gave up and put pasta on his head ).
Other than for the initial assessment, I haven't been in the room while he does his thing - which is play-based - I guess what I need is to be regaled with tales of how much speech therapy has helped other DCs.
Regale away!