Maybe its just that 'nobody got fired for buying from IBM' attitude in companies were techies have no say at all what company is buying and those managers are buying IBM marketing.
I don't want to say their HW is crap - honestly quite often it's good. It's just most over-hyped HW on the planet I guess and their technical documentation is hard to distinguish from marketing one. Then you should definitely check yourself all IBM's claims regarding that HW as you will quite often find it doesn't actually do what they said it will...
I totally agree with below statement:
Moral: Be VERY VERY CAREFUL when you read big blue.