My Ds was referred at 2!!! he is 2 and half next month and no way talking in sentences, not even 2 words togther he starts speech therapy tomorrow.
i have no doubt in the slightest about his hearing, he hears things longbefore i do and i have no issues, though he hasn't had a hearing test.
DS either says a word or he does not, there are no "sounds like" at all.
Oh and there has been very very minimal speech progression between 2 and now for us, i have been waiting for it as everyone says, but alas, no he is very clever and very with it also.
Lots of things he says from the back of his throat but the intonaton is so clear other people can understand him.
Apart from animal noises he has less than ten words for sure, that are clear anyway, in fact mabye less than 5 actually (not including animal/vehicle noises) but then he can say excuseme, thank you, sorry, bye etc all in intonation. Actually he can prob say mre than 5 as he can say oh oh whoops etc.
Tis very very difficult, esp when he is very with it in every other way.