Unexpected results

I've been taking part in a double top secret power hack for Endurance Nation over the past 4 weeks and this week is our testing week. Results so far have been positive for the guinea pigs with some showing upwards of a 7% increase in 5' power and others increasing their FTP by 5% in just 4 weeks.

The power hack wizard hasn't computed my new FTP but my test results are as follows:

Week 1, 5' Pavg: 322W
Week 5, 5' Pavg: 357W - Gain of 35W or 11% increase

My all time best 5' Pavg is 366W and was tested in 6/07.

Week 1, 20' Pavg: 278W
Week 5, 20' Pavg: 289W (first 10' @ 283W, second 10' @ 295W) - Gain of 11W or 4% increase

The test protocol was as follows:
WU: 15' - 20'
MS: 5' all out
12' easy
3' @ 30"on/30" off with on being at 120% of FTP
5' easy
20' all out
CD: 20 minutes easy

Feeling pretty good about the results and am anxious to learn what all of this means. I think I know - I haven't developed my FTP to its fullest potential.