Assuming you're getting the same thing... did you check those footers to see which times were slow? The age 2 ticks slowing things down will cause the "page generation" time to increase, that's the important time to identify heavy server load.
Even without age 2 though, there will always be some heavy work immediately after a tick - firstly private worlds 2-10 run through a ticker (even if they are not running, there is minor maintenance carried out on all world databases after each tick), then the "account ticker" runs which sorts out expiring accounts, deleting accounts, unused accounts, sends out email reminders and notices etc., and then finally the "bot" ticker runs which operates all of the bots (spawns new as necessary, picks targets, decides on running away, hiring, developing, sending of messages etc...).
The age 2 ticker running will just be making all of the above more noticable and go on for a longer length of time than before.