My macbook has always done this but I'd like to know if it's "normal." Say I'm using my macbook browsing macrumors.com and then I'm done so I close the lid. I open it a couple seconds later because I forgot to check something before I closed it shut - but now I have to wait 15 -20 seconds for it to turn back on. Why? No matter what button I press the computer refuses to turn back on for a good bit. Is there a way to fix this?