Akash,
You might be getting the data slowly. The delay might be caused by fscanf waiting for data to be available. As listed in the documentation - fscanf waits for data to be available until a timeout occurs.
You can confirm the same by checking that there 50 bytes available (25 bytes for character values + 25 bytes for terminator values) before you call the fscanf(s) in the for loop.
You can do so by checking the BytesAvailable field of the object.
s.BytesAvailable
I tried the same and was able to do so in < 1 second.
Hope this helps,
-Ankit
