PLEASE NOTE While smaller packets finish faster (WU's ie, 2 ^ 28 keys, takes the same amount of time), sending them takes up FAR more banwidth, and consume massive amounts of space compared to larger transfers in the log files. So if you have a machine, say, greater than a Penium, 2 ^ 33 is better! Sure it takes longer, and you won't get every last block out each day (they'll get out the next day, so they average out), but it GREATLY (by a factor of 32 in some cases) decrease the bandwidth used, and the size of the log files.