very nice scripting

I am using manual patched phoenix 1.50.
I noticed, that hasrates per device values were incorrect. (rates were too low)
I am not very familiar in php coding but I found this line in update.php
line 25
if (is_array($st) && time() - $st['timestamp']<3)
I increased the value from 3 to 15 seconds and now the rates seem to be correct.
Is there a reason, why you set the interval of file change date so low?