My friend told me that Plurk now support Real Time Update. He got this from Plurk developers. I got confused at first, because i see no updates at real time, just like the usual one. The fact is that the real time update is happening on the plurk response window.
In the past, you have to click the new updates to see the new responses on your plurk, but now you don't have to do that anymore, as plurk responses from your friends will be available to you in real time as long as you open your plurk status.
Great job to Plurk developers