Firmware 2xx was based on Broadcom SDK 5.100. With 354 Asus upgraded to SDK 5.110, with a totally different wireless driver, which introduced the issue. So reverting back to FW 270 was also reverting you back to the 5.100 driver, which was working correctly.
It was a bug/compatibility issue introduced with the 5.110 driver. Everyone with a Centrino 63xx, 62xx and 5xxx were affected.
Right. So what's your point?
The 5.110 driver introduced a compatibility issue with more than just Centrino 63xx, 62xx and 5xxx.
But it seems like you cannot accept that. In your mind, only certain intel products were affected by the new driver.