I like how this suggestion stemmed from that one sniper that's been doing this all the time in for_fild01 for the past two days.
Anyways, I agree - its annoying when you have to face a warper that got stripped, or got sc'ed, or got frozen, or ran out of yggs. And then they warp and don't call it a loss when it clearly is.
I say a good 2 second delay would be great. 10 would be horrible for mvp'ing and farming.