clarify blog post paragraph about latency

blog/_posts/2024-09-17-0.20-release.md

@@ -95,11 +95,13 @@ async fn write_bytes_chunked(
 ```
 
 Now the bytes should transfer much more smoothly,
-but we've introduced a new problem: latency.
+but we've potentially introduced a new problem: latency.
 After sending each `ByteSink.write()` request,
 we're waiting for the server to send back its response
 before we start the next request.
-That will likely slow things down considerably!
+Depending on the amount of time it takes for messages
+to travel between the client and server,
+waiting like that could slow things down considerably!
 
 Here's a naive, bad way to avoid such latency: