Kulemin, Reimer, Tlusty, Holzer, Stalberg, Komarov, Frattin, Gunner, Schenn, Kadri, Blacker, D'Amigo,
All those players are/will be in the NHL next season. Thats from 2006-2009.
2010 on ward are too soon to judge IMO. But it appears like you can add Rielly, Biggs, Percy, Leivo, Ross, Finn, Sparks, Granberg, Broll as guys that will play in the NHL one day.
That would be 21 players in 7 drafts. That is on average 3 NHL players per draft.
In the same time span, I only really see 9 players from 2006-2012 drafts making the NHL for the Sens.
Foligno, Karlsson, Smith, Cowen, Silfverberg, Lehner, Ceci, Zibanejad, Lazar
If you feel generous, add in Puemple, Stone and Condra.
So 21 compared to 12.