All of our web hosting packages run on the same infrastructure. We only limit based on space, bandwidth and number of hosted websites. It would not make any sense for us to artificially slow down our lower packages! Everything runs as best as it can.
We have pushed the limits of Cloud based shared hosting with our web hosting platform to give amazing hosting whether you have a small or larger budget.
If you want to really speed up your site then you should look at our Virtual Servers or Dedicated Servers. On these products we can optimise them for your specific site, using caching and so on to give you a performance boost.