Sure! One account owner can solely do just about anything on joint accounts, no? Like withdraw funds, change the address, change the account type, close the account, etc. Signing up for e-statements would be nothing different. (If you are talking about an authorized signer, however, things are different -- they don't OWN the account, of course.)
As a side note, the compliance requirements for e-statements exist because of the disclosures included on statements. For those disclosures (like error resolution procedures), the applicable regulations say notice to one account holder is sufficient, whether the delivery is paper or electronic.
Me, Type A? Maybe - I'm not done analyzing it yet.