Given the way Boullier defended Grosjean's questionable DNF, I'd say that they indeed have already moved to favor him over Raikkonen.
I don't think so. If the team had done that, we would have heard about it by now - Raikkonen might not say much, but that doesn't mean he says nothing at all. He joined Lotus under the belief that they could provide the best car available, and they had to be pretty convincing given how close he was to signing with Williams. If he thought that Lotus had already given up on him and started supporting Grosjean before him after just two races, he'd certainly have something to say about it.
No, I think Boullier's defence of Grosjean comes from the way he was pushing for Grosjean to join the sport. Boullier was part of a "task force" (you know things are serious when people start describing themselves as a "task force") aimed at getting the French Grand Prix back on the calendar. It was decided that the easiest way to do this was to make Formula 1 relevant to the French people again by getting a talented French driver into the sport. As Grosjean was the reigning GP2 champion at the time, he was seen as the ideal candidate for this.
The problem was that although being GP2 champion, Grosjean had already had a shot at Formula 1 in 2009. And even though the Renault R29 was not a very good car, he still visibly struggled; as Martin Brundle put it, Grosjean spun so often that he spent most of his time looking back at the part of the circuit he'd just driven on. As has been established several times before, success in GP2 does not guarantee success in Formula 1, and after two early DNFs in a car that was clearly quick, Boullier was probably feeling - or at least a anticipating - some pressure to justify signing Grosjean in the first place.
So I don't think Lotus are favouring Grosjean over Raikkonen just yet, but if Raikkonen continues to do what he did in Monaco, it wouldn't surprise me if Lotus start favouring Grosjean before too long. The topsy-turvy nature of the championship fight this year leads me to believe that teams will start throwing their full support behind one driver much sooner than they would earlier. I'm predicting it will come once someone scores his second victory of the year, especially if his most-immediate results were good.