Hey! So I'm interested in buying the $2200 MacBook Pro w/ Retina Display and I'm also kind of computer-illiterate. I have a question about the 256GB SSD. Is a computer's speed influenced at all by how large the drive is? In other words, besides the processor and RAM, would a 512GB SSD make the laptop run faster? And, this kind of goes with my previous question but is a SSD that has 200GB of data on it slower compared to a laptop that has 20GB of data? Sort of like the more something is carrying, the slower it is? Thanks SO much in advance!