I actually got major corrections, although the reason for this was (they said) because I was part-time and they wanted to give me 12mths to resubmit. There was some re-writing - the abstract and discussion section, and a few points for clarification, nothing I'd deem "major". The corrections actually only took a couple of weeks in the end.
The form at my uni didn't have the words "minor" or "major" written on it, just "pass with corrections", the timescale - <6mths, 6-12mths, and the process for resubmission.
As with everything PhD related, it's pretty subjective and down to both the examiners and the institution to decide. I really wouldn't worry too much about it, even if it takes 12mths to correct, it's not long in the scheme of things. Good luck!
Damo