I was another lucky one and did not have any dry runs either. My first call was a perfect match and things have worked out great.
I do know many people at my center that have had 2 dry runs - very few 3 - so normally by the 4th call (at my center) the patient is transplanted.
Good Luck and I hope the waiting goes by quickly for you and you are breathing with a new set of lungs soon.
Take Care,
Lindsey