How good is Ranger pitching?

The Rangers are poised to make a 3rd consecutive postseason appearance while at the same time completely re-loading their starting rotation. 

2010 did it with Cliff Lee, C.J. Wilson and Colby Lewis with a rookie Tommy Hunter as well.
2011 They almost won a world series with a very shaky rotation, C.J. Wilson, Colby Lewis, Derek Holland Matt Harrison filling out the rotation.

Introduce the 2012 rotation and the entire 2010 postseason rotation is gone, Matt Harrison, Derek Holland, Ryan Dempster and rookie Yu Darvish.

That is unbelievable to reload a rotation like that without breaking the bank or your farm system, are they even better?  Check out these numbers.

The Rangers projected postseason starting rotation since the middle of August.

Ryan Dempster
Since August 20th
36 1/3, 31 hits, 13 walks with 36 strikeouts. ERA of 2.97

Derek Holland
Since August 22
42 Innings Pitched, 33 hits, 9 walks with 38 strikeouts. ERA of 2.78

Matt Harrison
Since August 14th
46 2/3 IP, 40 hits, 11 walks, 33 strikeouts. ERA of 3.09 and its 1.96 if you take out his 5 & 1/3 inning start where he gave up 7 runs to Tampa Bay.

Yu Darvish:
Since August 17th
41 Innings Pitched, 17 hits, 9 walks with 48 strikeouts. ERA of 1.76
Only given up 8 hits in month of September.

Does this team have an ace? No they do not, what they do have is depth and that gives them an edge in a long series. Texas will be at a disadvantage in a elimination game versus another teams No.1 starter as this offense has failed to consistently produce in 2012 especially with Josh Hamilton and Michael Young in the heart of the lineup.