What do you think ?
If you do think there's a difference, what type do you prefer ?
Some interesting and questionable claims in this article:
http://www.premierguitar.com/Magazine/Issue/2008/Apr/Auditioning_Tone_Capacitors_Part_II.aspx
I especially like this: " If you want to use the vintage caps, make sure that you use vintage cloth wire inside your guitar and the Gibson fifties vintage wiring, otherwise you will not fully experience the tones from these caps."
So you don't get the proper effect from the cap unless you connect it with old wire ?

When people start making claims like this "tends to pronounce the mid frequencies a bit", I really have to question it.
Frequency response is easily checked and I bet no cap will show a difference.