8MB per 10 minutes is about 13.6 KB/s. What was the problem again?
Not that I think that simply increasing the block size limit to 8MB is a good solution (I'd rather see
something more dynamic) but if 13.6 KB/s is actually a problem, maybe you should fix your internet, rather than debate over Bitcoin.
But the idea isn't send a block of 8MB in 10 minutes

The higher the block, a few more milliseconds it takes to spread the block with a slightly higher chance of getting orphaned right?