stephrox

I'm pretty sure it was Season 5. Just look at these ratings from gossipcom:

Ep 1 - Gilmore Girls (#3: 5.7/ 8; A18-49: #4, 2.5/ 8 - #4 Viewers 6.20m)
Ep 2 - Gilmore Girls (#3: 5.9/ 9; A18-49: #4, 2.7/8 - Viewers 5.99m)
Ep 3 - Gilmore Girls (#3: 6.0/ 9; A18-49: #3, 2.5/7 - Viewers 6.10m)
Ep 4 - Gilmore Girls (#4: 5.3/ 8; A18-49: #4, 2.6/ 7 - Viewers 5.81m)
Ep 5 - Gilmore Girls (#5: 5.2/ 7; A18-49: #5, 2.4/ 7 - Viewers 5.64m)
Ep 6 - Gilmore Girls (#5: 5.2/ 7; A18-49: #5, 2.5/ 7 - Viewers 5.60m)
Ep 7 - Gilmore Girls (#5: 5.8/ 8; - Viewers 5.81m)
Ep 8 - Gilmore Girls (#4: 5.6/ 7; A18-49: #5, 2.8/ 7 - Viewers 6.13m)
Ep 9 - Gilmore Girls (#3: 5.7/ 8; A18-49: #4, 2.7/ 7 - Viewers 6.00m)
Ep 10 - Gilmore Girls (#4: 5.6/8; A18-49: #4, 2.7/7 - Viewers 6.23m)
Ep 11 - Gilmore Girls (#4 3.5 #4t A18-49: 2.3/6 - Viewers 5.04m)
Ep 12 - Gilmore Girls (#4t: 4.5/6; A18-49: #5 2.2/6 - Viewers 5.2m)
Ep 13 - Gilmore Girls (#3: 5.0/7; A18-49: #5 2.8/7 - #3 Viewers 6.26m)
Ep 14 - Gilmore Girls (#4: 5.0/7; A18-49: #3 2.3/6 - #4 Viewers 5.29m)
Ep 15 - Gilmore Girls (#3: 5.0/7; A18-49: #4 2.3/6 - #5 Viewers 5.37m)
Ep 16 - Gilmore Girls (#3t: 5.2/8; A18-49: #4 2.3/6 - #5 Viewers 5.42m)
Ep 17 - Gilmore Girls (#3: 4.9/7; A18-49: #4 2.4/6 - #4 Viewers 5.34m)
Ep 18 - Gilmore Girls (#3: 4.3/7; A18-49: #3 2.1/6 - #5 Viewers 4.82m)
Ep 19 - Gilmore Girls (A18-49: #4 2.4/7 - Viewers 5.52m)
Ep 20 - Gilmore Girls (#3: 4.9/7 A18-49: #3 2.3/6 - Viewers 5.41m)
Ep 21 - Gilmore Girls (#3: 4.7/7 A18-49: #3 2.2/6 - #4 Viewers 5.14m)
Ep 22 - Gilmore Girls (A18-49: #3 2.3/6 - #3 Viewers 5.89m)

Top 5:
5.13 (6.26m) 100 epi.
5.10 (6.23m)
5.01 (6.20m)
5.08 (6.13m)
5.03 (6.10m)

The highest post season 5 was for NAIL (6.01 premiere) which brought in 6.22m and 6.10 (6.3m) and stayed pretty high until 6.12. Then it went downhill - I wonder why ASP??? Maybe because thats when the characters started acting OOC and the whole April thing happeend.