The holes were there, Spiller is not running well. There is no doubt there were some runs where the line was blown up. But he did a very poor job and turned a lot of 3 yard runs into no-gains. This is probably why Fred is averaging more than him.
Example 1
http://www.flickr.com/photos/49431542@N00/9926655993/
He is in OK shape here, #70 is about to come off his block and get to the next level. He needs to hit this hole with authority or bounce outside. Instead he stutter steps up behind #74, the Jets get off their blocks and he has no momentum and is tackled for no gain.
Example 2
http://www.flickr.com/photos/49431542@N00/9926513286/
Hitting either spot will be a short gain. The left most hole is probably better as there is a chance that the lineman can move up to the next level and squeak out a few extra yards. Instead he stutter steps up behind his lineman again and his indecisiveness leads him nowhere.
Example 3
http://www.flickr.com/photos/49431542@N00/9926655483/
This one is the worst. Look at the gaping hole. He is looking and running to the outside from the beginning and wastes it. You can't necessarily fault him if that is the play design, but I also wonder whether he knows the play. They are running the hurry up, it is entirely possible he is having a hard time getting the play call and doesn't know the blocking scheme and what hole he is supposed to hit?