Latest update from Sean & Brian:
Several pages were identified over the last day or two as being priorities for optimisation. Optimised versions of these pages have now been deployed.
So far we have seen a significant improvement to overall server throughput (number of pages served per second) by 80%-100%. Conversely, the time taken to serve individual pages has been roughly halved.
However - we are still not satisfied with the overall performance, there is still a noticeable delay in page loading.
We are now looking at additional areas to optimise. It will however be a few more days before we will likely see any further speed improvements.
We will provide another update tomorrow.