It would be nice to have the possibility to interlace selected messages while sending them using split test.

What I exactly mean... lets say we've got 4 messages and set up campaign for 30 people, we want the winner to be determined and we send 10% of each message as the first stage.

What sending engine will do is:

1. send 3 messages A,
2. after that - send 3 messages B,
3. after that - send 3 messages C,
4. after that - send 3 messages D.

What I'd like it to do:

1. send 1 message A,
2. after that - send 1 message B,
3. after that - send 1 message C,
4. after that - send 1 message D,
5. if not 12 messages already sent (4*10% = 4*3 = 12) - go to 1.

Why would I like it? When we send 300000 messages and lets say 100000 in the first stage, then the first message is received by people even several hours earlier (depends on server speed) than the last message. This way 'winner determination' stage isn't fair - first message has got a lot bigger changes to win than do last one.