Yup, though a lot of the "Lelouch is alive" believers are just misinformed. I've seen people claim that Lelouch is alive due to... what the heck, let's quote; "maybe you need to rewatch the show cause the cart driver had his face", which means that they've seen the poorly edited joke video on YouTube and thought of it as official for some reason.
To be fair though, a vast majority of those who've for some reason believed that he survived actually react rationally when you supply all the indisputable evidence that explicitly states that he's in fact dead, such as the statements from the director (Taniguchi Goro), "Word of God" from the author (Okouchi Ichiro), all the official post screening material and even C.C.'s new monologue that was recorded for the compilation movie. The only ones we generally have a problem with are those who decide to still believe that he's alive and even decides to preach to others about his miraculous rebirth and/or survival in face of a shipload of proof to the contrary.