My DD7 had only a few words until she was 3, then in one month she went from Mama to multi-word sentences.

She also walked late (19 months) and has always lagged in gross and fine motor.

She was not an early reader, but at age 5.5 went from a couple sight words to chapter books in 3 months.

She definitely tends to be a kid who does things via the explosion method LOL!

Mom to DD9 and DD3