it does music match, it just doesn't tell you. when i uploaded, it would show two songs that were uploading slowly and show the percentages. while doing that, it would show the uploaded songs increase by 15-20 in 6-7 seconds. so it must have been matching all those other songs.
there's no way to tell if a song was matched or uploaded either. in the play music app, every song (even those directly from Google play) have an option to fix a matching problem