Did Cicero's speech at the trial of Gnaeus Plancius really convince the jury?

Gnaeus Plancius was accused of treason, but his friend Cicero defended him and his defense is considered one of the greatest defenses in Roman history.<br><br>The defense itself was highly praised. This, from Cicero's own account, is what he said to conclude: *"If it [the Republic] should fall into ruin, however, I would care nothing for my future or my fate; for if she is overthrown, it will mean that there is nothing left for me to hope for. While she remains safe and sound, however, I will always entertain the hope of regaining what I have lost."*<br><br><br>My question is: did the speech really convince the jury?<br><br>Or did other factors play a role in his acquittal?