The comparison with IBM...
is limping a little; even at its worst, IBM was still offering stuff that actually worked. My experience with Dell hardware for businesses is mixed, to put it very gently. Two companies I was working for swore never to buy anything by Dell again after having received pretty much what was ordered, but with several debilitating flaws, like the one server that was for some reason delivered with an optical drive that wouldn't work while the hard disk was on the same or the other IDE bus (OK, ancient history...), or the more recent server with space for 8 hard disks and dual RAID controllers, but for some reason equipped with only four power connectors for HDDs. And no, Dell could not deliver the required Y cables and told us that if we used 3rd party parts, all warranty was off.
Never had that sort of problem with IBM; they always found a way to solve such problems. Once, IBM service actually copied a PC I was having problems with component by component overnight to see whether they could replicate the trouble. They could. I had called them on a Saturday. Monday morning, I had a disc in the mail with the bugfix on it. And no, I was not at the time working for a big corporation. Imagine that happening with Dell? No bloody way.
Anyway, all that said, my point is that Dell have managed to pretty much burn themselves with a lot of potential customers. I doubt those will come back. IBM, 20 years ago, at least still had their old reputation for reliability and service. That's what saved their necks IMHO.