There are many who have been granted PR.
The fastest on record is this woman from Jamaica who got and ITA on Mar 27th and PPR on May 14th. For others, it has taken anywhere from 2 months to 4 months to receive a PPR.
And the stated policy is that 80% of all eligible applicants will get a PPR within 6 months from the date of submission of an application after getting their ITA.
Hope that helps.