I read too many misleading about this. So, I will set it straight:
For the sponsored immigration applications (no matter where the application is submitted.), if the applicant has been in Ontario, Canada for 3 months, then he/she is eligible for OHIP, which is confirmed by OHIP. The only argument here is the confirmation of the immigration application. OHIP says it should be a confirmation letter from CIC. But the CIC does not agree. (I got the CIC response.) And the most important is that the LAW does not require the confirmation letter, only the confirmation. And I think for the sponsored immigration applications, as long as the sponsorship is approved, then it is confirmed by CIC. However, the person I sponsored is not in Canada yet, so OHIP can not assess my case. So, I\'d like to see if someone does it. If someone has the same case and got refused by OHIP, I will provide legal assist for free.
You are confusing sponsorship approval and PR approval. The sponsorship approval doesn't have any impact on the APPLICANT other than that the SPONSOR has been found to be eligible and the PR application can now proceed to be reviewed and decided. Therefore sponsorship approval would have no impact on OHIP. The confirmation letter OHIP is looking for is the confirmation of PR for the APPLICANT.