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I present a selection of CP-PACS and UKQCD data for the pseudo-Goldstonemasses in $N_f=2$ QCD with doubly degenerate quarks. At least the more chiralpoints should be consistent with Chiral Perturbation Theory for the latter tobe useful in an extrapolation to physical masses. I find consistency with thechiral prediction but no striking evidence for chiral logs. Nonetheless, theconsistency guarantees that the original estimate, by Gasser and Leutwyler, ofthe $N_f=2$ QCD low-energy scale $\Lambda_3$ was not entirely wrong.Comment: 18 pages, 5 figures containing 7 graph

$M_\pi^2$ versus mq: comparing CP-PACS and UKQCD data to Chiral Perturbation Theory