I am in two minds (or none, more precisely) on this
On the one hand, Lotus have been there or thereabouts for much of the season so far, and could have won in Bahrain, and some of the teams who have won I would not classify as being as strong as the Lotus, that it would seem to be a strong chance for them to take a win, as some have said, Kimi at Spa would be a good bet.
That said, this is the part of the season where some teams start to stretch their legs, and the understanding of the cars, conditions and tyres etc gets stronger, and the field will spread, so the chance to spring a surprise is reduced. Can Lotus keep up with the pace? I am not sure, they were not really able to last year, so who knows.
On balance though, and the fact that a friend works for them, I am going to say that they can, and will.