Originally Posted by ridefixed

A lugged bike is not necessarily heavier. Our brazer up here at Serotta weighed all of the lugs and tubes of a Csi (our lugged steel - available in any shape or size) against all of the tubes of the Colorado III (our Tig welded steel frame). The Csi was marginally lighter. Lugs themselves are very light, and the tubing is drawn differently for the two models.

Tubes are replaceable in either method of joining. Lugs do look nice. Built by a good builder, strength will not be an issue. David Kirk builds some beautiful fillet brazed frames.
http://www.kirkframeworks.com/index.htm