I have been a big fan of the Nekkid Portafilter, using it almost exclusively for the last year. A few weeks ago, I started using my double-spout and have to say, these past couple of days have been some of the prettiest, best tasting doubles I may have ever pulled.
It takes me a few more pulls to get the grind dialed in now, I have more of a tendency to choke it than I did before, but once it's there - mmmmMMMM!
I seriously doubt the better taste has anything to do with using a double spout in place of the nekkid. I've actually slacked off and quit using the WDT method and am sure I'm getting some channeling, so I'm going to chalk up the better taste to a better than average roast.
The look I can attribute to the spouts though - it just tends to calm down the foamy bubbles I get when going bottomless. (Porky Piggin' it!) Gorgeous stripes and specks in my cup this morning.
-Stubbie