Lots of speculation on the speed (or lack thereof) of indoor on this website.
The math has already been done on this. There is an optimal speed for each banked track which allows runners to move without exerting any lateral force; this varies according to the angle of the turn. Cheserek's 3:49 at BU, for example, was what happens when a runner's speed and a track's angle perfectly aligns. This is equivalent to running on a flat 400m track-- or perhaps even faster, given a lack of wind and the ability to get splits every 100m.
Now, that doesn't mean BU track is fast. It is actually dependent upon the race. In the women's 5k, for example, the track was actually quite SLOW, in fact, as the women's slower speed coupled w/ high banked turns meant higher lateral exertion.
So the main takeaway is a track is not simply fast or not fast like this website's owners make it out to be. It is fast for some races, and much slower for others. And as to the 'bounciness' of the indoor surfaces, I should add, have been proven slower than the top-notch outdoor tracks.
TLDR: If you are not aware of the angle of the banking and the speed of the runners (and ignorant of the math necessary to figure out the ideal speed) then you should not be throwing out blanket statements like 'The track is fast!' as this is entirely dependent upon each specific races' pace.