Dell does pretty good in storage
I think at least. I don't use their stuff, but I'd wager storage is a strong #2 behind servers with Dell, with networking being a very distant 3rd. Maybe I'm wrong though. Compellent and Exanet are both pretty good sets of technology. I *wish* HP had something equivalent to an Exanet in their NAS lineup (StoreAll and StoreEasy don't cut it).
For Dell shops at least, I think what they have is good enough for a lot of folks. They've come a long way from being an EMC reseller and just have equallogic (which I'd never touch).
You say they need a better storage culture, they have a better storage culture through their acquisitions. It's miles ahead from where it was 5 years ago.
I'm not a Dell customer right now but I certainly respect Dell a hell of a lot more these days than I did 5-6 years ago in large part because of the progress they've made in storage.
They tried investing in networking but I think their acquisition of Force10 just fell apart(or so it seems anyway maybe I'm wrong), some of the Force10 stuff hasn't been updated in what seems like 8 years now.