Will there be lottery for advanced degree petitions?

Uscis received more than 20,000 petitions for advanced degree cap-exempt quota. But in the ‘alert’ uscis mentioned that they will conduct a ‘selection process’ for 20,000 petitions and rest will be counted in regular quota. Uscis doesnt mention if that ‘selection process’ for 20,000 petitions is lottery or not.

so i started reading article which can found on following link:

As per the article, 


"How USCIS Determines if an H-1B Petition is Subject to the FY 2014 Cap

	We use the information provided in Part C of the H-1B Data Collection and Filing Fee Exemption Supplement (Form I-129, pages 17 through 19) to determine whether a petition is subject to the 65,000 H-1B numerical limitation (the "cap"). Some petitions are exempt from the cap under the advanced degree exemption provided to the first 20,000 petitions filed for a beneficiary who has obtained a U.S. master's degree or higher. Unless otherwise exempt from the cap, petitions filed on behalf of beneficiaries who have obtained a U.S. master's degree or higher will be counted against the regular cap once USCIS has received sufficient petitions to reach the advanced degree exemption."

	now my question is uscis mentions " first " 20,000 petitions and did not say anything about lottery for advanced degree cap exempt quota. 

	So why most of the people assume there will be lottery? Do u think my assumption that there will not be lottery for 20,000 petitions is baseless or illogical? If yes why?

Link is below:

Yes, that is what happened in 2008. There was lottery for both.