For his goal he didn't have to outpace anyone. As Delphinho said, he was put through in loads of space. The closest player was Godfrey who reacts really slowly.
Having said that, it's true that he doesn't look slow in that moment, but for me that was about the last time I saw him run quickly. In every other game, he looked actually slow—that's a worry at least. Hopefully he's over the injuries and you're proved right.