Hi Nick,
Yes and no....
Yes because it's going to be in the same ballpark.
No, because it's not going to be an absolute number (on the rising OR falling edge) because the carrier signal might "come on" (or off) at any time. If it happens to do that just before we check it the delay will be very short, if it happens to do it just after we just checked the delay will be a little longer.

I measured a couple of pulses here.
Delay on rising edge: 10, 7.5, 9.5, 10, 7.5, 6.5 us
Delay on falling edge: 9.5, 11.5, 12, 8, 8, 11 us

So I think you can consider 12us to be around the worst case for this particular code. Would you prefer constant delay at the cost of it being longer? (Not promising anything, just asking).

And, don't forget it's Programmers Day today - the 256th day of the year! :-)

/Henrik.