As far as I know riot uses UDP for their packet style which doesn't send out information in specific order like TCP would.
tcp:
I have 15 packets of information
send the first 1
did they get it
send the next one or resend the last one.
UDP:
I have 15 packets to send
send 1-15
did you get all that
yes good, no oh well next 15
They use UDP because it is better for sending a lot of small chunks of information than TCP even though it is less reliable for each individual packet.
The network that riot is working on getting in place should remove a lot of the loss of packets that they see right now.
Won't help ping all that much but it will make higher ping not seem so bad.
TL:DR There is more information being sent out and therefore a higher chance that some of it will get lost.