That matches what I saw on the service, particularly how many conversations reach a second message.
Most comparisons of Plenty of Fish skip how many obvious fakes survive a week, which is the part that matters.
Out of roughly 80 matches on the service, 5 turned into an actual conversation.
If you're only browsing, the platform is fine. The moment how quickly you can narrow a list down matters, it changes.
That is my read on Plenty of Fish anyway, others will have had different luck.
Worth comparing against Datedesire for this exact use case before you commit to anything.