Can you show your work on that?
Tierney has a career pts/g of .43,
I counted 28 forwards drafted between 2005 and 2015, with 12 having higher than .43pts per game (11 if you don't count Senyshyn who only played 6 games), so 43% or 39%. That includes Cherepanov who died before playing a game (RIP).
NHL Draft Finder | Hockey-Reference.com
The only way I can make any sense of your claim is if you're comparing Tiereney' pts per game this past season to draft picks between 2005-2015 career pts per game, while omiting the 2015 draft, which is less a fun fact and more a misleading one.
Shit. You're right. I was doing some analysis with guys around the 33 and 78 positions as well and forgot to exclude them. I'll edit the original post.
The number I've got now is 64%. Still good, but not as good. My bad.
2015 16 Mathew Barzal 0.8846154
2010 16 Vladimir Tarasenko 0.8441815
2015 17 Kyle Connor 0.8072289
2010 14 Jaden Schwartz 0.7013487
2014 15 Dylan Larkin 0.6838046
2012 17 Tomas Hertl 0.6181015
2011 15 J.T. Miller 0.6130952
2015 14 Jake DeBrusk 0.5911330
2014 13 Jakub Vrana 0.5387755
2005 17 Martin Hanzal 0.5022288
2015 15 Zachary Senyshyn 0.4999999
2013 14 Alexander Wennberg 0.4843373
2011 13 Sven Baertschi 0.4742268
2006 14 Michael Grabner 0.4312500
2006 13 Jiri Tlusty 0.3968610
2007 13 Lars Eller 0.3899204
2008 16 Joe Colborne 0.3864407
2011 16 Joel Armia 0.3762712
2014 16 Sonny Milano 0.3760000
2012 13 Radek Faksa 0.3646724
2012 16 Tom Wilson 0.3601533
2009 13 Zack Kassian 0.3371429
2009 15 Peter Holland 0.3195489
2012 14 Zemgus Girgensons 0.2822086
2006 17 Trevor Lewis 0.2418398
2008 14 Zach Boychuk 0.2362205
2013 17 Curtis Lazar 0.2147887
2005 15 Ryan O'Marra 0.2121212
2010 17 Joey Hishon 0.1538461
2007 16 Colton Gillies 0.1168831
2005 13 Marek Zagrapan 0.0000000
2005 16 Alex Bourret 0.0000000
2007 17 Alexei Cherepanov 0.0000000