MarketingVox says:
An eROI study of emails sent, read and clicked on shows that the market has finally evened out into a sort of stasis where the number of emails sent out on a particular day of the week is only that which won’t overload the reading rate. This has also reduced the volatility of click rates from day to day.
Click through to see graphs from last year for contrast. ExactTarget and MarketingSherpa email send study results here.
