Nothing special!!
my elder daughter can speak "mama" "papa", etc.. at 8 months..
she can complete 60 pcs puzzles by herself at 2 years ago. but she is not a gifted child which acedemic is so so now at 7 years old.
my younger daughter cannot speak good until she is 3 years old but I suspect she is a gifted child caused she can read(not speak) english sentences(more than 20 sentences) without teaching her. she just learn it by herself(she stand next to her sister when her sister is reading) - she is now 3.5 years old...
so, my cases reflected that early speaking is not a sign as a clever child or not.