When I use my GPS around SD, I consistently get places in 5 to 10 minutes less than the GPS says when i first enter the destination.
As a test I just entered my address and my best friends address in Santa Ana. I make the drive at least 2 or 3 times a month and know exactly how long it takes me. Google maps said 1 hr and 9 minutes. It takes me 53 to 55 minutes almost every time.
