From the linked article: "When you have an Android handset you can never be certain how long you will have to wait for an OS update. What we mean by this is that the HTC Thunderbolt is still waiting for Gingerbread 2.3, and we are talking about one of HTC’s and Verizon’s top selling handsets. Users know that they never get this issue with Apple, as you only have one new phone released in a year and when iOS gets an upgrade all iPhone users get it – minus one or two features for the older models that is."
If that were only true! Verizon iPhone users wait and wait for OS updates. So while I agree that waiting on OS updates is not an issue with Apple per se, waiting for Apple products to be updated on VZW is an issue but it's that way with all phone types, or that's my experience.