In the five years since Biel 2007 Magnus Carlsen has played 27 round robins. When the first of these events was played he was 16 years old and outside the top 15. Carlsen has finished top three in 26 of these 27 tournaments (the exception being Wijk 2009 where he was 0.5 from shared second place), and won the majority.
Carlsen’s results have been consistent for a player aged 16-21 that only plays top events. As a comparison Anand finished in the bottom half in some tournaments in 2011, and Kramnik was below top six in both his latest Tal Memorials.
Carlsen has performed 2815+ nine round robins in a row, and in 14 of the 15 latest. The list over the last five years looks like this:
Biel 2007 =1st +4 -2 =3 2753
Tal Memorial 2007 =3rd +1 -1 =7 2743
Wijk 2008 =1st +5 -2 =6 2824
Linares 2008 2nd +5 -3 =6 2808
Baku 2008 =1st +4 -1 =8 2795
Foros 2008 1st +5 -0 =6 2877
Biel 2008 3rd +3 -1 =6 2740
Bilbao 2008 =2nd +3 -3 =4 2768
Wijk 2009 =5th +2 -1 =10 2739
Linares 2009 3rd +3 -2 =9 2777
Sofia 2009 =2nd +3 -1 =6 2822
Dortmund 2009 =2nd +2 -1 =7 2773
Nanjing 2009 1st +6 -0 =4 3002
Tal Memorial 2009 =2nd +2 -0 =7 2838
London 2009 1st +3 -0 =4 2839
Wijk 2010 1st +5 -1 =7 2822
Bazna 2010 1st +5 -0 =5 2918
Bilbao 2010 3rd +1 -2 =3 2718
Nanjing 2010 1st +4 -0 =6 2901
London 2010 1st +4 -2 =1 2815
Wijk 2011 =3rd +5 -2 =6 2815
Bazna 2011 =1st +3 -0 =7 2853
Biel 2011 1st +5 -1 =4 2833
Sao Paulo/Bilbao 2011 =1st +3 -1 =6 2842
Tal Memorial 2011 =1st +2 -0 =7 2849
London 2011 3rd +3 -0 =5 2875
Wijk 2012 =2nd +4 -1 =8 2830
Including non-classical events like Amber and the World Blitz Championship Carlsen has 13 round robins in a row with a 2810+ performance (last Amber starts = 2854 and 2880, latest World Blitz = 2894 and 2810, top three in all four events and wins in two of them).
Counting from Nanjing 2009 Carlsen has scored 55 wins and 10 losses in these top tournaments, but even if his results improved in the second half of the five-year-period there are also some good results before the events on the list. The result just before the 27 tournaments was Dortmund 2007 where Carlsen was sixth (just ahead of Gelfand), but before that he shared second in Linares.