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That is what I read indeed, but having used it I can confirm you that it is functioning with what appears to me to be adequate force because I was able to lock the rear wheel anytime and without particular trouble/effort.
That is why I raises the question here because I can't seem to find a correlation between what I read and what I experienced, which is causing my mind some troubles haha
A long-pull lever will pull enough cable, but will lose mechanical advantage at the lever. This isn't a problem for long-pull brakes, as the mechanical advantage is at the caliper.
However, in a short-pull system (i.e. "road" lever and caliper), the mechanical advantage is at the lever. While a short-pull brake will still hit the rim with a long-pull lever, once it gets there the system won't be able to exert as much braking force.