No, or not very likely. This is a user-to-user forum although you do see Steinberg folks on occasion. For a lot of locations (US for sure) use My Steinberg to submit a support request. Response seems to vary by location, in US it has been good for me. And in some locations (not sure where) support is provided by the local distributor. This seems to be iffy.
First most folks are not having the performance issues the folks posting here are seeing. These kinds of issues almost always end up being an interaction between Cubase and the specific hardware on your computer. (For an excellent general overview of this https://www.youtube.com/watch?v=GUsLLEkswzE )
Most (but not all) of you have posted that you are seeing a problem and yet you have provided zero info about your configuration. You will never get an answer that way. This is why we encourage folks to put their system info in their sigs so we don’t have to keep asking about it (hint, hint 
).
Try the test shown in the video of comparing real-time playback with exporting audio to start sleuthing where bottlenecks might be occurring. Good luck.