Concerning Quicksilver's speed (spoilers)

I know a lot of people think that he was given too much speed in the recent X-Men movie. That is certainly up for debate.

So how fast was he?

Well, let's talk about the Speed of Light. At the speed of light, you are travelling approx 18,600 miles in 1/10th of a second or about 980 million feet in 1/10th of a second. You would travel around the Earth over 7 times in a second.

In the recent X-Men movie, we see Quicksilver rescuing almost everybody from the school before the explosion gets to them.

So, let's say he rescued 50 people. (I know he rescued several at a time in a few instances and he dallied around a bit, but for ease of math, let's just say he made 50 trips.) Each trip required going into the school, finding someone, and bringing them outside. So, being very liberal, let's say each trip was 500 feet total. That's a total of 25,000 feet he traveled.

Gunpowder explodes at 600-900 ft per second. Super fast explosions can reach 25,000 feet per second. Let's say the explosion in the school was somewhere in the middle, at 12,500 feet per second.

Assuming the explosion went about 250 feet, Quicksilver would have had to rescue everyone in about .02 seconds.

Quicksilver, then, was traveling about 850,000 mph. Speed of light is about 67 million miles per hour. So Quicksilver was going about 1/120 the speed of light.

In the first Superman movie with Reeves, he was flying around the Earth several times per second. (Of course, he didn't have the friction of the atmosphere to deal with.) So, you could argue that Superman is approx. 100 times faster than Quicksilver. Which would explain his speed in Batman vs Superman. Now, it took him some time to build up that speed in the original movie, but even early on, he was getting it pretty good.

A few notes:

1) I'm am very ignorant in the world of comics. I'm sure there are many instances of speed we could study.
2) I'm a pretty poor mathematician. My math may be way off. I tried to use online calculators/converters where I could. Someone please check my math.
3) I used approximations.
4) I understand there can be other opinions on how many trips Quicksilver made, or if he would be faster building up a head of steam.
5) We don't know exactly how long the explosion was going before QS started, so factor in a bit more time for that. So instead of 1/120th the speed of light, let's cut him some slack and say he was going 2x that fast and was going 1/60th the speed of light. Still 60x slower than Superman. And would take him about 8 secs to get around the Earth.

I don't know how that compares to Flash or other fast superheroes.