Not that you want to take advice from a guy with a non-running bike at the moment, but...
I have one of those filters on my bike and it does flow very well however, since the bike is DOA for the time being, I decided to replace the 102.5 MJ for a 105. I removed the carb bottoms and found red dust. Not as much as before installation, but it was still there. I know the filter screen isn't as fine as paper, so take it with a grain of salt.
The filter did catch alot of the larger stuff but the very, very fine silty stuff it did miss. Mind you, my tank has a failing lining so if your is in better nick, then you have nothing to worry about. Having the clear tube to view through helps a ton as well.