I have a three year old MacBook running Tiger and I just bought an iPad. Apparently, syncing my iPad with my MacBook requires 10.5 or higher, so I would need to update to Snow Leopard. My question is this: would updating an old computer to such a new operating system make it run slower? For example, I updated my iPhone 3G to iOS 4 and it's very slow now. Would updating an old laptop to Snow Leopard affect the performance in any way?