[Dovecot] LDA vs LMTP, Cyrus SASL, verbose_proctitle

Is there a reason I should prefer LMTP over LDA for local delivery? Performance? Security? The Wiki doesn't differentiates LMTP vs LDA with respect to sendmail configuration, so am I correct that I just need to replace mail.local with dovecot-lda, which will choose LDA/LMTP based on dovecot.conf?

Also, can I consolidate authentication by configuring dovecot to use what sendmail uses (Cyrus SASL) or vice versa? The Wiki hints this is in the works.

Lastly, toggling verbose_proctitle seems to have no effect on the output of ps. Is verbose_proctitle broken for Solaris?

Thanks, Joseph Tam <jtam.home@gmail.com>