Speed: finding, at the moment, that it is harder to get the bass string to respond while playing fast notes than to coordinate the hand movements. That's probably a plateau however.
Sightreading: it's like speedreading. I have always had a reputation as a good sightreader and never had any problem with clef changes, can read equally well in treble, alto, tenor, bass clef, octave up or down, chant, percussion clef, and transposing by a whole step. For some reason it stops there and I crash and burn trying to transpose other intervals at sight. Anyway, just as in reading any other language, you look at groups of markings, whether they are notes or rests, about 1/2 bar or 1 bar ahead of where you are playing, depending on tempo. It amounts to fairly memorizing a bar ahead, but really, it is analyzing, then committing it to auto-pilot while you read farther ahead. Notes form a little road map which you translate to your left hand, and lucky you, you have a whole bar to figure out how to do that. So, really you are not reading notes so much as pre-planning your shifts and string crossings, dig? Just like when you drive, you don't have to concentrate about what road you are on, only the exits and turns. If there is a run, train your eye to pick out whether it is strictly scalar or if not, then mentally plan that run to take place in the allotted time. You will quickly learn to see the pattern for a straight arpeggio in the root key (no accidentals), or if something is non-chordal. As soon as you identify a chordal arpeggio, you can immediately "forget" about it, and look ahead for anything more complicated, which will take you more time to study. Forget about bar lines, they only slow you down. Just look at notes and rests, as if you were reading chant. To change clefs you only have to get a lock on the first note. The rest goes by interval. You know what a fourth and a fifth looks like. You don't need to study what key you are in; your ear will tell you that, so just worry about accidentals. After a while you will find that for example in a solo piece that constantly switches between bass, treble and tenor clef, you don't even notice the clef changes any more, because the line you are playing will dictate where the next note has to be on the staff, and the clef marking is negligible. In other words when you are headed in a direction where there is about to be a whole phalanx of ledger lines, you can anticipate there will be a clef change, and the first note after that will tell you what the clef changed to, although you can usually guess anyway. Not suggesting that anyone can expect to sightread the solo bass literature, but it just makes it easier to jump in and out of the sheet music, like in your lesson for example when you start and stop a lot.
Probably no one can sightread any challenge stone-cold and perfectly, but those are some things that may make it easier. It IS a learned skill and requires considerable practice at first, but once you get good at it, you will retain the "tricks".
Hyperventilating: I would drop my bass.
Voodoo: it's all voodoo, anyway, which is another way of saying none of it is. When the aliens come back to see how their colony is getting on, they will say OK, we'll buy this violin thing, and maybe the cello, but this bass thing? You people have entirely too much time on your hands.

To master the bass we have to (or will have to, there may be more to discover yet) be in charge of ourselves in all our dimensions to a degree most people don't consider.
Pantz: Q: boxers or briefs? A: depends.
