A maximum of 8,000 new, complete CEC applications will be considered for processing for the period of May 1, 2014, until April 30, 2015, unless otherwise indicated in a future Ministerial Instruction.
That's a good question. I called CIC help line few weeks ago and I was told the same.
However, here http://www.cic.gc.ca/english/immigrate/cec/applications-accepted.asp you can find:
As of May 1, 2014, there is an overall cap of 8,000 for new Canadian Experience Class applications. There are also sub-caps of 200 for each National Occupational Classification B applications. These are the last applications we will accept under the current system before Express Entry launches in January 2015.