Spanish 21: Surrender 16vA if dealer forgets to peek?

Does anybody know? This seems to happen a lot at my local store.

What about 16vT?

Or if anyone has the exact number I should decrement my surrender indices by in each case that would be excellent.

Surrender than 16. Wizardofodds lists the following early surrenders for blackjack:

5 Vs. Ace
6 Vs. Ace
7 Vs. Ace
12 Vs. Ace
13 Vs. Ace
14 Vs. 10
14 Vs. Ace
15 Vs. 10
15 Vs. Ace
16 Vs. 9
16 Vs. 10
16 Vs. Ace
17 Vs. Ace
3+3 Vs. Ace
6+6 Vs. Ace
7+7 Vs. 10
7+7 Vs. Ace
8+8 Vs. 10
8+8 Vs. Ace

So, I'd assume the less marginal ones are valid for Spanish 21- i.e. maybe don't surrender 12 v. A.