It may be smoother but it's much slower and therefore less sporting.

Since that stinkin movie Fast and Bi-Curious came out I've heard lots of people tossing "double clutch" out more than ever before. Many of them haven't got a clue what it is.

Clutch in.
Move shifter out of gear.
Clutch out.
Clutch in.
Move shifter into gear.
Clutch out.

Not a very common procedure.