Because it happens all the time.
With the NSA downloading and analyzing all of the posts here at FR in an effort to thwart all of the domestic terrorists that communicate here,
they no doubt intentionally overload our servers with a DNS attack which is what causes the difficulties for us here at FR.
It must take a while to work through all of the witty and intelligent posts here at FR, so they slow our servers down so that their super computers can keep up with all of the, ‘code talk’, that goes on here.