I've stayed away from this up to now, because for me when I first started most of the names were meaningless to me anyway, so I usually call Tim and sort out what I want. This is how I have ended up with all the pickups I have (including some AV Apaches and some pre-production pickups!).
When I first saw the Geoff Whitehorn add for BK's, I checked on line and saw reviews on HC, and then emailed BK. Tim was very fast answering me, and after trading a couple of emails I decided a phone call would work better. An hour or so on the phone later and I had ordered my first 5 BK's :roll: Once I heard them I was ready for more, so another couple of phone calls, and I had my next few sets. I was lucky enough to be asked to help out at LGS in 2005 (I used to work in music retail many years ago, and was living in London at the time). That year Feline and Keely were sharing the stand, so I got to try lots of Felines with BK's, as well as some of Tim's guitars. I must have been OK on the stand because I have been invited back to the other shows!! All of this has allowed me to hear lots of BK's and also to talk to lots of people about the pickups. There really is no substitute for research. I can understand if you are in a dealer's and see them in a box, but the dealer should be able to advise you about the sound to expect.
This weekend I will be taking a couple of guitars to my local music shop in Hoboken (Guitar Bar). They are a small shop but have quite a good range of effects and parts, and are nice guys in general. They also have good prices on strings! Anyway I will take my 57 strat with Apaches, and probably an LP with PG Blues (I bought it from one of the guys there about 8 years ago when he was working at Hoboken Vintage Guitars). I doubt that Apache will mean anything much to them other than native American Indians, PG Blues may have more meaning. Howver I am sure that when they hear them they will know what Tim was getting at.
My point is that the names are just for rough guidance and you can't beat research. The names haven't made me buy or not buy pickups. I don't have Yardbirds (I like the band - but I have a 62 tele, and these are that sound [they nail it]), Boss (not a big Springsteen fan, but the Black Guards came out when I was about to get a Boss set, and I pefered them), Country Boy's (Albert Lee is good, but I prefer the rockier tele sounds), Sinners (I like Judas Priest, but just haven't come up with a reason for Sinners), BKP-92 (but I do have a Pig-90 - I may get 92's at some point - I am a big P-90 fan).