I was wondering if anyone knew if this was still being worked on or if it's still even a concern at all.

I know for me the lag is still pretty significant compared to all the other sites I navigate on.

I believe it's still being worked on. The main concern was to reduce downtime by moving to new servers. Now that this is complete, the lag issue can be addressed.

Someone correct me if I'm wrong. :)

That's about the same story I have. The lag was actually a lot better early Friday after Alex posted about the work he did, but then I left for the cottage for the weekend. Since the site came back the lag seems to have returned for me, but they're probably still working on it.