Competitive is an interesting word to use though...
When you really think about it, it's not really Apple Versus Dell.
It's Dell Versus Gateway Versus IBM, Versus Alienware... etc.
I mean you can't really get a better analogy then "comparing apples and oranges" no pun intended.
The fact still remains that every apple I have owned, iBook, 2 Powerbooks and a MBP, have ALL outperformed every other computer I have ever owned. They all performed the same as the day I opened the box.
What I remember from when I look at the PC computers I have owned... Various Dell Desktops, Toshiba Laptops, and Dell Laptops... Their performance was good at first, and steadily declined until their deaths (with the exception of 1 Dell Desktop I currently own now). But even the desktop is probably 1/3 to 1/2 slower then when I got it... even keeping up with all adware, spyware, viruses, defragmenting, etc... this computer is CLEAN, why, cause I NEVER USE IT because I own an apple. I use it every once and a while to run Tivo To Go and a few other apps not supported on the mac.
So I think it's unfair to compare the two... Even though I see what you're saying... that if Dell has it out, apple should be right there with its counterpart. But then again all Dell does is slap parts together... they don't work on the "entire" machine. Apple slaps is computers together, but has its own OS, own applications, etc. As a company Apple has a whole lot to do. Dell just needs to keep on getting parts from Sharp, Toshiba, Sony, Intel, etc. and just slap a plastic casing around them with that little silver circle.
So Yes you're right, you would expect all manufacturers to be on the same level... but when a company has to put a lot more into their machines... mainly their own programming, you can understand why things are a month or two back.
But let's just be honest... Apple is worth the wait.