Well, I have to chime in on this one.
A TRUE PTP signal path in a simple circuit does have a slight tonal advantage (those with tin ears might not be able to notice).
The benefits are that there are no added leads or solder joints.
The negatives are if a pot, jack or tube socket has to be replaced, the amp basically has to be rebuilt.
I did some prototyping for Mercury Magnetics a couple of years ago when the Valve Junior craze was starting. I ended up making a high-end combo with a TRUE PTP signal path that used a VJ circuit that Alan Cyre came up with and tweaked it slighly to my taste. I took one of the amps to the North Carolina Fall Ampfest last year and people were blown away. The room was 40' X 60' and my 5 watt amp followed Greg Germino's 100 watter, the promoter of the event apologized for scheduling my demo after the high wattage amps. I no longer build and sell these, but here is a link to a video of Greg Germino playing it (the video camera mic captured it nicely).
http://www.vintageamp.net/ampfest/mm5.html
Here are a couple of pics of the prototype (Note; The signal path is TRUE PTP, the powersupply is Garolite turret board);
And there are clips of that amp on Mercury Magnetics website.
True it is not feasable to build most circuits with true ptp, but Matchless does some really cool ptp/terminal strip construction.
Turret board and eyelet board are not ptp, but they are handwired, true ptp has no added leads an use the leads of the resistor/capacitor to connect directly to the origin and destination, 1 part-2 solder joints, anything else is another form of construction.
MikeY