The real test for iso is low light photos, and those shots seem to be done under daylight conditions or very well lite area. So it is not a great indicator of iso performance.
Super Frequent Flyer, no joke. Ex Patriot and loving it.
Canon Eos 60D, T1i/500D, Eos1, Eos 630, Olympus EPL-1, and a part time Pentax K-X shooter.