Is this delay in the SDK's SMS gateway, or to do with roaming?
For the project I have in mind, instant delivery is an important part
of the system behaviour.
Sorry it took so long.  I understand there are some issues with US
carriers transmitting messages in a timely fashion.  Unfortunately
thats outside of our realm.  I can say with confidence that *usually*
the message transmission is pretty much instant.
Regards, Nigel