Is it possible to have the first email sent within X minutes of detecting an abandoned cart? Currently the "Send abandoned cart emails" setting allows only a selection between 1-99 days.
SeeWhy.com says their A/B tests have found that sending the first email the same day results in the most conversions. They state "The reason for this is that an immediate email ‘connects’ with the emotion of the originally intended purchase. This emotion dissipates rapidly. We often also see higher average order values with an immediate email for this reason (this was a factor at Lucky Brand, for example)."