The tracks with real "soul" in them are usually pretty obvious imo. You can say the same about tracks without it. Here's the problem with soul:
1. Soul is commonly referred to a description, not a feeling. Soul should be a feeling whether its Gothic techno or a Detroit classic.
2. Personal feeling is an opinion, so it's hard to place factual judgment on a topic like this. Just because I think a track is soulless doesn't mean it really is.
3. People mix up soul with other intentions. This is common right now because of the minimal bandwagon issue. Some artists are viewed as bandwagon jumpers, when in reality, they're truly placing their heart and soul into the music because they believe in it.
4. Producers can't get their true feelings across musically. While they may have the true heart and soul, its sometimes hard to put into beats and sounds without the know-how. I think this is a huge factor in this subject.
Personally, my favorite tracks are the ones where the first time you hear the track you think, "Man, I totally feel where the artist was going with this..." or something to the affect that you feel you're on the same level. Those tracks obviously have soul and true intent to them. On the flip side of the coin, you hear tracks and you think, "This was always meant to be a B2 track," or you can tell it's just imitating another vibe or sound.