Road,
I have gone through the same thing with my XRABF.
He may take a day to respond to MY email. But the last one HE sent was at 9am...I was working...and by noon he was texting asking why I "had gone silent?"
There seems to be a double standard with them. THEIR time frame is acceptable...but not ours.
I can only conclude that they lack the coping mechanism of PATIENCE and that there is a lot of insecurity. He flat out admits to the insecurity...
On the other hand, maybe its a control mechanism to KEEP you at your phone...waiting.
I'm not sure. But I know its frustrating.
I just try to remind myself that I"m NOT responsible for a loose cannon.