I'm on virgins 50 mb package (currently the fastest in my area) and I have a consistent 49.5 mb/s download 4.5 mb/s uploads (give or take)
Also I'm living in one of the higher subscription areas for cable in the u.k. and experience no slow down during the peak times
Hope this helps

---------- Post added at 12:17 ---------- Previous post was at 12:12 ----------
P.S. your area is ready for 100 mb/s on virgin media