Oh, all the time! And I thought I heard dd (13 months now) saying stuff at a young age. One example was at about 11 months: I was giving something to her sister and asked "you got it?" and baby dd goes "got it". I thought I was hearing things until older dd goes "she just said 'got it'".

She babbles her ABCs and anything she hears on Dora - she tries to say "backpack" during the backpack song and the "dee-dee-dee-dee-Dora".