Sorry for being a bit suspicious, but are there any actual pictures of the farm? Considering the snail speed of adding dozens of terrahashes weekly in previous months yesterdays addition of +600 THs sounds too good to be true...
In the past they needed to wait for new chips to arrive. The manufacturers were delaying the deployment. This time around the chips were in stock, not pre-ordered as before.
You may also monitor the address directly:
https://blockchain.info/address/1PETAmNrgdzx3FwzJPNuhx18JVKdGtwWt6