The AMD oboard graphics are actually alot faster technically speaking than any Intel offerings, even the latest ones. The catalyst driver should definitely be thrown into the mix along side with the open source driver. Even still, catalyst in Linux does not perform even close to the Windows offering (overall) and it really pains me, because they would be the best bang-for-the buck systems otherwise.
No announcement yet.
Intel Haswell HD Graphics 4600 Performance On Ubuntu Linux