Or at least he will be once the Live Top List takes today's games into account. With his very convincing win over Boris Gelfand (it looked like the kind of game I would lose to a super-GM), Levon Aronian has pushed into clear first in the Tal Memorial with 2.5/3.
Also winning today were Vladimir Kramnik and Shakhriyar Mamedyarov. Kramnik was worse against Pavel Eljanov, but Eljanov missed some chances and then completely lost the thread in an ending with two rooks and a minor piece on each side. Eljanov sent a rook on a long fishing trip, only to discover that it gave Kramnik an initiative that won the game. As for Mamedyarov, he had to win his game against Alexei Shirov twice, but he did it. Mamedyarov missed a couple of tactical chances just before the time control (one was especially beautiful), but when Shirov erred just after the time control Mamedyarov was given a second chance, which he converted.
The battle of ex-prodigies Sergey Karjakin and Hikaru Nakamura was a long one, but the result was clear long before the game ended. Karjakin had enough of an advantage to play the rook ending out for a long time, but there was little doubt that Nakamura would draw, as he did. The other game, between Alexander Grischuk and Wang Hao, was a very short one, and it showed that when GMs believe the game is drawn and/or don't feel like playing, they will find a way to draw the game when they want to, Sofia rules or not.
Standings After Round 3:
1. Aronian 2.5
2-6. Karjakin, Wang Hao, Mamedyarov, Nakamura, Grischuk 2
7. Kramnik 1.5
8. Gelfand 1
9-10. Shirov, Eljanov 0(!)
Round 4 Pairings:
Nakamura (2) - Kramnik (1.5)
Wang Hao (2) - Eljanov (0)
Gelfand (1) - Grischuk (2)
Mamedyarov (2) - Aronian (2.5)
Karjakin (2) - Shirov (0)
The games, with my comments, are here. The relays were down for much of the round and the scores were messed up, but I have the correct moves for all five games.