The point is, as long as there's no a single, accepted, definition of what multitasking means, we will be comparing apples to oranges.

Microsoft said Windows 3.1 did multitasling (cooperative). IBM said no, and argued OS/2 did multitasking (pre-emptive). Microsoft then said NT did real multitasking (independent input queues).

In my "book" multitasking also implies that tasks are not frozen randomly. They may be killed (OOM) but not just frozen around without me knowing or noticing it.

(EDIT)
Like wicket says above: "I just want a device that behaves like a computer."
(/EDIT)

In Android the only way to have a task continuously running is by having a persistent notification (AFAIK, maybe there are other ways). This is hacky, unreliable, and just plain wrong (again, in my book).