oops I posted to the wrong thread...sorry!
I wouldn't worry. My older dd8 started reading spontaneously before Kindergarten but it took my younger dd6 a little longer. She is also extremely verbal. She was speaking in complex sentences by 15 months, using humor, large vocab correctly etc. She has always been in love with books but reading just did not click for her until the summer after kindergarten. Now in first grade she is a very competent reader and well above grade level. Interestingly older dd8 who was the early reader barely spoke a work until she was two :-) Go figure...