I've ran a SpeedTest & it came out the same as my other laptop (Dell XPS M1330 - 2008) old laptop, I know. Anyways, I've been experiencing slow internet/random delays while gaming & it only happens when I'm on my MacBook Pro. My Dell XPS is completely fine, so are my consoles. I play a game called Old School RuneScape & whenever I click to move, there's a noticeable delay & it's getting to the point to be very frustrating, my character will not move for 2 or so odd seconds, along with using the Internet sometimes webpages take much longer to load. Again, I experience none of these problems on my Dell XPS laptop, & it most certainly isn't the games' servers doing this. Please take note that this is not a FPS issue. OS X Yosemite.