OP must've miscalculated, surely. 0.1 pageviews per machine per second is quite amusing though.
"We're really struggling here cap'n":)
"We're really struggling here cap'n":)
Quantcast actually gives 1 million pageviews a day (and not a month), which is, yes, 10/s (and 550 times less than Tumblr).
Either Quantcast numbers are very off, either Posterous can indeed run on very few servers.
(edit: but yeah, you only need 100 servers if you're running something with "enterprise" in the name ;)