During our stay 9/8-12 the early entry time was only 45 minutes early. The one day we used early entry, they started letting everyone through right at 9:15 (10am opening). We were toward the end of the line, so got in at nearly 9:30 -- plenty of time to walk onto Little Mermaid twice, ride Soarin, and be toward the front of the group for Toy Story rope drop.
Most people make a beeline for World of Color fastpasses, so if you'd rather ride LM / SOC quickly, do that first!