Rubbing salt into the wound, HP added that, in the past three months, the migration rate from Sun to HP shops has increased by 50%.

While Sun and HP have been in a PR contest to prove who is raiding whose base best, the fact is that only a very small percentage of customers are pure shops, and only a small portion of the remaining customers are in play at all. That said, converting large customers can bring in millions of dollars a pop, so competitive replacements are not just good PR, but good business – when you can get it.