The Leki Speedlocks weigh about twice what the BD Flicklocks do (the 2012 versions at least). The Leki locks come in at about an ounce per lock, where as the BD locks are more like half an ounce (15-16 grams on my scale).
I haven't pulled off the new BD Flicklock design to weigh it, but I'll assume that it's marginally lighter. Regardless, I find that it holds very, very well, even when bushwhacking.
I do like my Leki Aergon poles, but they aren't as stiff as the BD poles. To keep the same or similar weight, it comes out of the aluminum section because of how heavy the locks themselves are.
FWIW, I just bought a pair of BD Traverse ski poles, removed everything but the aluminum sections with attached flicklocks, put on Leki baskets and Gossamer Gear grips, and the weight came out very reasonable. 8 oz per pole, and they extend up to 60" for pitching the Duomid under a variety of conditions. Not bad for something that weighs less than the BD Carbon Cork and has a much longer usable length.