Not in the least surprising. Back when I used to play women's Sunday league football, I remember the England women's team taking on a men's non-league team who'd had a good run in the FA cup (3rd round giant killer type thing) and losing. Why does this surprise you? Men are bigger, faster and stronger. (And in the case of football, socialised to take part more or less from when they can walk, whereas girls who want to play football have to be lucky enough to be born into supportive families, and born with a certain type of fuck-you attitude to social pressure which is still strongly against women's participation - meaning that men's teams just have a far bigger pool of talent to choose from).
The equal pay thing is a red-herring. The point of the rules of competitive sport and the league structures that go with it is to ensure a fair contest, because wildly uneven contests make for matches that are no fun to play in and no fun to watch (and it's the watching that's big business). Once you've ensured a fair contest, via sex segregation, weight divisions, age divisions, some sort of league structure rather than totally "open" competitions, there's no reason why the ensuing matches shouldn't be equally enjoyable to watch. (I'm not a tennis fan, but I'm told that a lot of tennis fans prefer watching women's tennis because the men's game has become a kind of crash-bang-wallop-over-in-a-second matter of strength of service whereas the women's game still has skillful rallies.)
The place where it should matter, where we should all be saying "dammit, the emperor has no clothes on", is the area of MTT competitors in women's sport - Fallon Fox, the enormously tall fifty something bloke in women's college basketball in the US, the recent Australian "world record breaking" weight lifter in the women's classes, the mountain biker who doesn't even "present as a woman" during his day job, the Saudi "women's" football team with 8 MTT members - people should be looking at these MTT and saying "that's just blatant cheating" rather than applauding their bravery.