As well, I wouldn't call anyone before the middle half of the 20th century squeaky clean, so I'm not trying to say they were on par with modern society, but the middle ages often is portrayed far worse than it really was as a reaction to the Victorians portraying it far better than it actually was.
I definitely agree with that. The so-called Dark Ages were far from as dark as one would believe from the baggage left by pre-1960s historians.
Still, average life expectancy was shorter than today and there are obvious reasons for it. There are accounts of Saracen doctors being horrified by the medical practices of the crusaders - remedies like cutting a cross into the back of a patient suffering from gout, and salting it. Even taking propaganda into account, there must have been big differences. Science was more advanced overall in the Moslem culture, partly thanks to them rediscovering (or never even forgetting) the ancient Greeks earlier. After the first crusade, one of the most common causes of death for the Latin population of the kingdom of Jerusalem was fever. Even though the majority of them were privileged (merchants, officials, knights, nobles) and would have lived in better circumstances than the mostly Syrian majority of commoners. It's not like Westerners were allergic to the Levant. A hotter climate probably made things like awareness of basic hygiene tell.
It seems as if circumstances varied a lot, from time to time and place to place. It was possible to live to a very advanced age, and lead an active life, so it's not like I'm saying that everyone everywhere was a barbarian.