Have to agree with the thread, why so long? A new S class will be on the starting grid by then. I think Toyota need to shake themselves even when they are late to the party like with the GS F it still comes second/third to Bmw and Merc, why? They tackled this specific section of the market i.e. sports model deluxe and then make it slower than the existing class leaders. I have heard all the stories that it is cheaper and has more of this and that, Lexus failed in what they set their sights on and this is disappointing to all Lexus owners.
Very disappointed in this latest delay and I say this as a loyal Lexus owner (2) of ten years standing (and will buy another no doubt), but if this site is to be useful then give honest and positive criticism and use it to assist Lexus - and not just mindlessly endorse everything as wonderful.
I guess to me there isn't much to criticize as it would be beating a dead horse.

We all know the LS is long in the tooth and is on its last legs but if you look at sales figures here in the states, it still sells #2/#3 most months. The substantial refresh gave it enough legs until this all new model arrives.
As a LS F-Sport owner I'm well aware of its deficiencies when I drive a S550, S63, S8 etc. Hopefully with the next LS, they are clearly addressed and the LS is considered among the top of the heap again.
On a related note, the Flagship market has completely changed. This used to be a market dominated by the S-class, LS and 7-series. Now the A8 has gotten better. We now have the Panamera and updated XJ and Maserati Quattroporte. We have even the Hyundia/Kia cars. In addition, we have cars like the A 7/CLS/6 Gran Coupe that are priced in this same area and likely took some sales.
Thus from everything I have heard, the new LS will be boldly different than years past, where Lexus knows it will alienate a lot of past LS customers. Which means they are hard at work on the next GS to try to keep some people there.