Excelsior does release its CPNE pass rate. See HERE
Pass rate in 2012 (most recent year available) was 46%. 2011 was 61%.
While I sympathize with you having "wasted" all the time and money with Excelsior only to be "dismissed" after your 3rd failure of the CPNE (I know I would be crushed), it is clear from the get go what the expectations are. Your number of years of experience as a LPN (or Paramedic or Resp therapist) does not come into play for the CPNE if you don't do it the "Excelsior way". You may be the greatest LPN in the world and do everything correctly at work, but fail the CPNE for not doing it their way.
I did my CPNE with 3 others, all 3 were LVN's (with 10 years or more experience each), all on their 2nd attempt.
1 failed out on Sunday morning (not sure what happened, I did not see her).
The 2nd was waiting to do her final adult assessment.
She told me that the reason she failed the first CPNE is she did not practice the "Excelsior way" and it caused her to fail.
The assessment she had failed on Saturday was a mistake she made and knew it when she did it (I don't recall what it was).
The 3rd passed without failing a single skill or patient care assessment. He said he had to unlearn his way of doing things and do them how the CPNE wanted it. He practiced it at work and at home, all the time.
I somehow passed the first time.
As for the College Network, Excelsior states on their site they are not affiliated with any 3rd party publisher. They get nothing from them and tell students they are not needed.
I got roped into using DLSI and spent way more than I should have. I did use their stuff to study and pass, but if I had know better I could have saved a few thousand off my degree cost.
I passed my study guides on to 2 other paramedics where I work to use (one signed up with College Network and hates their stuff).