Before revision:  In addition, we propose an alternate scaling -\log(p_\lambda) instead of -\log(1-\lambda), for which the limit \lim_{\lambda\rightarrow 0^+}-E}[ -E}[ \log(1-\lambda) / \log(p_\lambda)=1.}
After revision:  In addition, we propose an alternate scaling -\log(p_\lambda) instead of -\log(1-\lambda), for which the limit \lim_{\lambda\rightarrow 0^+}-E}[ /\log(p_\lambda) is well defined and non-zero (contrary to \lim_{\lambda\rightarrow 0^+-E}[ \log(1-\lambda) / \log(p_\lambda)=1.}