hm why would this be related to the applet?
I guess you are refering to firefly, in general.
Probably true, for files which lack ID3 info.
I have most of my files saved as artist/album/## – title
where ## is for the track number. This is but the safest way to store music files I can think of. Works even without tags.
But I admit that sorting in firefly is kinda messy, atm.