Been using blockchain.info for a couple of years now and I've always done the standard fee that blockchain allows and all transactions have normally taken an hour, this one however is still not pending, currently 0/3
It seems that the user created this account for the purpose of this question but because you are using blockchain.info for several years, have you noticed that you are paying a higher fee than usual?
There are a lot of wallets that do not need much technical knowledge and which are much better than blockchain.info wallet.
I thought "priorized" uses the maximum fee for the faster transactions. Sender address was legacy in my case, which was the another reason of delayed cconfirmation. Thank you for breaking down it.
Address type does not affect the speed of confirmation but reduces the fee.
Blockchain.info (buggy wallet) uses legacy addresses and therefore higher fees (normal fee using that wallet need longer confirmation time.)