I have seen more than couple, easily 5. But those were from 1st world countries like Australia, US, Belgium etc.. You are from Pakistan, in that case i don't know. Or even if we forget first world countries for a while,i wonder if it safe to assume that Ottawa VO is fast!?!! And I guess for Pakistan the VO is London which also is very time consuming, so it would be a gamble if you apply Inland and may work in your favour... Sorry if i made you confused..
Whatever it is,i would suggest you to apply asap without dwelling on to get a new PCC or not... if it is easier for you to get a new PCC like 10 days time, then i would say go for a new PCC and apply and if not then apply with thecurrent PCC and let us see...Again, these are my views could be 100 % right or 100% wrong...