The statement in the article is not consistent with clearing pending applications with a PD prior to January 2011 in 5 years @ 2,803 approvals per year.
No applications are pending beyond April 2010 and the 14,400 figure is fairly consistent with known pending applications to that date.
PERM certifications started to rise sharply for India after this time.
There were 5,583 Indian PERM certifications with a PD of Jan-Apr 2010. These have translated to 4,677 pending EB2-I I-485 applications in the July 2018 USCIS Inventory (a factor of 83.77%).
If we use the known EB2-I pending applications for May 2009 - April 2010 from the July 2018 Inventory (13,567) and then use the above factor on PERM certifications after that date, there would be 45,778 I-485 pending for EB2-I before September 2011.
At 2,803 approvals / year, this would imply around a 16 year wait. At 6,000 approvals / year this would reduce to around 7.5 years.
I don't do predictions, so the above is just an example so that you can play around with the figures and assumptions should you wish to.
The PERM certification data can be found
here.