I found the article I was referring to:
The Progress Report On The ‘Shidduch Crisis’ – By Shlomo Yehuda Rechnitz
Here are the quotes I mentioned:
“From interviews with the busier shadchanim in Lakewood, I gleaned that approximately one boy in five gets engaged to the first girl he meets.”
From the paragraph before (this is different than I remembered; it refers to the average, not the majority):