I got it on Thursday and I replied back on same day.. so technically we both replied on same day.. let’s see..No not yet. However, I was able to speak to an IRCC agent today and he did confirm from the notes available on my profile that the confirmation email had indeed been sent out. So at least we know that it's real.
Did you receive the portal email this week? I got it on Wednesday; replied back the next day. Maybe this is a new domain which they have initiated this week. I am not sure how many folks have received this email from Etobicoke which has "Ontario" in the domain.