Blocki and Alwen's second attack

Hi,
https://github.com/bryant/argon2rs/pull/18 brought to my attention an attack documented in https://eprint.iacr.org/2016/759.pdf. The paper has been around for a few months now and mentions that t_cost needs to be > 10. However, the t_cost in `run.c` is still 3. Is this attack a legitimate concern? Should `run.c` be patched to 10?