Surely you're not assuming that the Neistat brothers' experience is typical and usual?
Several posters to this thread have said they've gotten more than 18 months and their iPod is still going strong. Apple has posted a number of tips that can help the battery keep going longer; I suppose these can be referred to as best practices.
Come on, you're not jealous just 'cause Apple is more successful than you, are you? They've been selling a boatload of iPods, that's for sure.
When it's Microsoft that corners the market, you cheer wildly, but when Apple comes on strong, you're on their heels like a jackal. Strange, that.
We're obviously in different income brackets.