They were, they achieved 47 points in their last 23 games, a PPG ratio of 2.04. Newcastle second with 45, and Sheff Wed 3rd. Over that period Reading achieved 42 points, 5 points behind (PPG 1.83). You are probably looking at a table that calculates the second round of fixtures against each...
Fulham were top of the table for the second half of the season, averaging over 2 points per game. That says recently they have probably been playing much better than they did for the first half of the season, and suggests their current level is very high. In that respect, the table doesn't tell...