I guess it depends a bit what they mean by `the average employee receiving approximately five months of severance` (and also where you are seeing it from, maybe its seen as more generous when seen from the US). In Sweeden the notice period for the employer is between 1 and 6 months, depending on how long the empoyee has worked there. If they count that period in as part of the severance package, it could wery well be "the legal minimum" or "the legal minimum + 2 months", which sounds less great than 5 months :-p
If its "the legal minimum + approximately 5 months" then it's generous.
In the other developer-downscalings I know about here in Scandinavia (Norway if it matters) the most common deal has been 6 months, either "work for the remaining notice period, then 6 months pay" or "6 months pay, you work out the current month". I say "deal", because its a deal where the employee gets that pay, and then resigns voluntarily. If they don't take the deal they only receive the legal minimum, but they can then fight the firering, which can get expensive and complicated (I have never heard about anyone not taking the deal).