Typically what happens is you lose talent and work with less numbers on the products/solutions acquired. Because the size of HP and it's 320,000 employees, many products or product groups get swallowed up and just become part of the larger HP. WebOS, while a focus for HP on several fronts; it's still one offering in a MASSIVE portfolio. Because of this, resources on most solutions are actually constrained and under staffed.
Originally Posted by gbp
Now being part of HP is great from a brand awareness, $$$, marketing and industry leadership position; working in a company of this size typically slows progress and innovation waaaayyyyy down. You no longer have the laser focus on a specific offering, industry or region. This would hold true for those companies you mention above.
Also, I'm sure a lot of senior management have wanted to get their hands on WebOS or parts of the Palm business, thus internal battles ensued. This would slow progress for sure.
The other thing that could happen from an acquisition is to leave the acquired company as a one off, stand alone business. This would allow them to move faster, have more $$$ and backing from the larger HP. However, this didn't happen with the Palm acquisition; at least I don't think it did.
So, trust me, THEY ARE NOT SLOW, just slower then a smaller more focused company on a subset of markets HP is in. just saying