Pratt & Whitney letter
There was a letter published by Pratt & Whitney in 1998 concerning this exact topic. I re-read the letter, which in some areas included some serious mathematical equations, and came upon a paragraph I had highlighted the first time I read the letter. Among other concerns, they included this small piece of information:
"The engine inlet size basically determines the capture area for water ingestion. However, the amount of air ingested depends upon aircraft and engine speed. At high aircraft speeds and low engine rpm more air is being forced into the inlet than the engines require. Thus air is spilled out of the inlet which effectively reduces the size of the column of air being ingested. The water droplets, being heavy, are not ejected and the result is an increased water/air ratio. On a typical high bypass ratio engine, this scoop factor during idle descent increases the water/air ratio by as much as 200%. Increasing engine rpm increases the airflow requirement while maintaining the same area for water ingestion. Reducing aircraft speed will also reduce air spillage around the inlet. This combination significantly reduces the water/air ratio as illustrated in Figure 3."
Figure 3 is nothing more than a visual of the above words.
I was not able to find a link to the article.