It 'is' the Techie board
Basically, data is sent in chunks over the internet.
If a chunk is too big, it fails, and has to be resent.
This effectively slows your internet connection down.
Depends on your computer, modem, and who your ISP is.
Lowering the 'Maximum Transfer Unit' size should mean less fails, and a faster connection.
In Theory
And yes, having a drinky poo as I type