Lotus have a faster car overall. I would not call it luck.
The high speed nature and abrasiveness of the Silverstone track will generate enough energy in the tyres, so I don't see an issue for Lotus.
The W03 will have something else to prove this weekend: whether they've improved their high speed performance. A known weak point.
It may have improved, but not by much I think.
I expect a mediocre performance this weekend.
Somebody posted the onboard laps from Malaysian qualifying, somewhere, and Schumacher was losing some 20kmh compared to Kimi in the first high speed corners of Sepang.
I expect Mercedes to be slow in the sector that includes Copse, Beckets/Maggots, Stowe.
Yeah Shanghai's middle sector is all slow corners; where Rosberg was half a second faster than everyone else.
As I said before; it has nothing to do with circuit characters or anything; Mercedes's entire performance is based on weather, nothing more.
Unfortunately, I don't think it's like that. They had high top speed, due to DDRS, on Friday, then, for Saturday, they changed setup to put lot more downforce and became average on top speed, their S2 was the fastest in qualifying, but only by 1,5 tenth to 3rd(Webber).
So even with exchanged top speed/downforce(DDRS enabled them to do it there), they were not so much faster than other cars and Shanghai's S2 doesn't even have true high speed corners but rather a couple of medium speed ones.