I saw a similar booth at the San Jose airport a while back. I stopped by and asked them how they could prove to me that Jesus selected them in the spring of 1919 as the only true religion. They looked at each other, shrugged and then asked "where did you hear that?"
I told them I have an aunt in the movement and she told me.
The man and woman said "Well your aunt is obviously confused and is mistaken."
"So when was your organization picked by Jesus as the only true one?" I queried back.
Their reply was "Well it was a slow and carefully planned process that cannot be nailed to a specific time or date."
Since my flight was about to board I thanked them and said I would look into it further.
It is so amazing to me that JW's either do not know about 1919 or are too embarassed or unsure to explain it. It seems to me that such a selection by Jesus should a monumental date in the history of the Society and they should be well equipped to explain it. After all, it's not everyday that Jesus stops by and says "Well done slave!, I now appoint you over all my belongings."
Apparently the only belongings they received were 3 robe garments and 2 pairs of sandals.