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Also, in the B540 driver there is this option.
Show Image
(http://abload.de/img/capture4poiu.jpg)
Can we assume that, if the driver says it has the ability to change LED color on compatible models, this new "optical switch" will be able to use RGB led?
Nope. The pic shows Red, Green and yellow. You can get that with a bicolor LED with 2 leads that can fit stock MX switches too. Besides, RGB is all about the PCB and controller and positioning of the LED and leads. A redesigned MX case would make them "RGB compatible", just by making the LED area a bit bigger so you can fit 5mm LED's. Cherry chose to do things differently and made clear housings with a lens in the normal LED spot so they can work with surface mount LED's. That makes production cheaper for the keyboard manufacturer.
It's interesting at least, but the marketingspeak is..... OVER 9000!!!!
What switch has a debounce of 18ms? Cherry recommends 5ms, although most of their switches stabilise in just 1 or 2.
I don't see any tactile component in the switches so I guess they're linear. I prefer to have at least some tactility in my switches.
Rubber dome / membrane maybe? And that some keyboard operate at 125hz less.
I think what a4 did is just remove the contact plate and put the optical sensor in place, that's my guess though. If it proves right, it's also still possible to make tactile key construction I think.
The pictures of the other switches they show are Cherry MX, so they're comparing their optical switches to Cherry MX Linear with 80g springs (Blacks) throughout. Switch debounce has nothing to do with port polling rate, although it does affect response. Even so, 18ms is longer than 2 polling cycles at 125Hz. In one of their graphics they show 18-30ms to settle. Not sure where they pulled that from, but I bet it smells.
I like their testing method with the metal plate across the 2 boards. The one with light switches will of course go down first (their 50g spring switch) and then that will act as a pivot to press the other switch down (I assume 80g MX). That's like totally scientific, dude! Yeah, now pass that spliff to me 'cos it must be reaaallly good.
The switch housing and design is very different from Cherry MX despite the similarities in external looks. You need 4 contacts for the optical sensor and IMHO there isn't enough space for a tactile spring on the side with the sensors, so... Not sure how they'd make these tactile.
Don't get me wrong, I find these switches very interesting and would love to try them out (although at 1.2mm actuation point and light springs and being linear I would probably mistype with them a lot. I already find Reds easy to mistype with), but when a company posts so much BS on their product site I am not impressed and become rather negative about the honesty and integrity of the company and thus have very little compulsion to support them in any way. There's marketing and then there's deliberately deceiving your potential customers and lying about your competitors products.