...and I would agree. The HR24 is equal in speed to the Vip series.
OTOH, the HR21/22/23 are all not anywhere close in speed of operation. There is discussion of the upcoming HDGUI which is all new code from what I've been reading, that is designed to give a better overall UI and be much quicker in operation. Due out in October, but 'soon' might be a more descriptive term for the actual release.