Actually the dinosaurs with the largest EQ's (brain body ratio), scored about 5.8
Dinosaur Brains and Intelligence - Enchanted Learning Software, humans score from 5-8 by the looks of things, dolphins score lower
http://www.aquaticape.org/eq.html. Here's a source placing the spread of humans from 5-10, and **** erectus at only 4.8 (erectus were a tribal tool using species). So dinosaurs definitly had enough brain.