To my ears, the NF is more akin to a P-90. Regardless, I really, really like them.
I certainly don't dislike the Narrowfield in my Special or the 58/15 MT's whether in full humbucking mode or tapped. The purpose of my posts was more to explain the difference between the Special and a 509 as I see it. Both are great guitars but I do feel they are very different despite appearing to be relatively similar - both having split/tapped Humbuckers with a pick-up in-between. Both have the same 5 way switch with positions 2 and 4 adding the middle pick-up to either Humbucker but the big difference is that the 509 in position 3 lets you play just the middle pickup on its own where as the special, like any double humbucker guitar, engages both humbuckers together. With the 509, you can't pair both Humbuckers and with the Special you cannot use the NF on its own.
That means you can run the 509 as a HSH, HSS, SSS or SSH and in my opinion, the SSS tones are much closer to a tele/strat than anything the Special can offer. Even if you tap both Humbuckers on the Special, with the NF too, it still sounds like there is a Humbucker in there - maybe not as much as say a full humbucker would but its not the same as a single coil like the 509 has in the middle. It doesn't matter if the Humbuckers when tapped sound just like a Single Coil, there is still that fuller sounding NF too.
I often hear that one of the best Strat tones is the neck and middle, something that when the 509 neck is split, it comes reasonably close considering the difference in the build between it and a proper Strat, but tapping the neck and using the NF - essentially the same pick up selection, there is quite a difference. It still sounds like there is some HB-ish (P90 may well be a good analogy) sound coming through. If, as some here seem to think, the NF, which is a 57/08 humbucker - the same wire, same magnets etc just narrower - sounds more P90ish, then that still isn't the same as a 509 or Strat single coil middle pickup.
To me, the 509 is a 3 instruments into 1 guitar - even if it can't do 'everything' a Les Paul, Tele or Strat could offer, it can still do a reasonable job and good enough that it could pass for all three in a covers band for example. I really don't feel the same about the Special. Its a Custom 22-08 (like the Custom 24-08) but with a few extra options to fine tune and give a few more options than a Custom 22-08 would if PRS brought that to market. Its an expanded Custom 22 - a guitar with more than the standard 5 options you normally get from a Custom 22. I don't think its trying to be a tele, a strat and a Les Paul all rolled into 1 instrument like the 509 is.
That's not hating on the NF or the Special either, its just that I think that both the 509 and Special, like I also stated in the 513 vs Special thread, are different and have a different role. The 509 to be the guitar to take instead of 3 whilst the Special to be a Custom 22 with many more options than just the 5 you normally get...