[Elecraft] TX DLY in VOX mode?

[Bill W5WVO]

I'm running the K3 in DATA A mode for WSJT using straight-through audio connections and using VOX to key the rig (and amp). The amp uses an old frame relay, and consequently I have TX DLY set to 20 ms, the max. I'm concerned that RF out when using VOX may not be delayed by TX DLY as it is when using PTT control. Can someone state as a fact certain that the delay is there when using VOX? If so, what happens to the audio stream that triggers the VOX -- is it buffered in a DSP delay line for up to 20 ms, or is it simply gated off for up to 20 ms? Not a big deal in WSJT since the messages are extremely short and loop continuously, but I'd like to know. 

Bill W5WVO