Keep in mind that it's more difficult to play an instrument slow and soft than loud and fast. The job of an orchestra is to play as an ensemble and not as a group of soloists. In most respects, I see ensemble playing as being the responsibility of the conductor but one can only do so much with what they have to work with. Classical musicians must have a knowledge of performance practice and a technique which will facilitate the objectives of a conductor and/or composer. This is why some conservatories pay more attention to ensemble playing than coaching along solo careers. The pedagogy of these two disciplines are significantly different from one another.
Contrary to popular belief, musicians in the best orchestras will always make mistakes however they are often covered over or they're faint to the ear. Primarily what makes a good performance is difficult to pin down exactly but I've often found that the experienced and competitive groups will take on a sense of danger whenever they're motivated by artistic inspiration. An inspired Berlin Philharmonic playing Beethoven under the baton of a fiery Furtwängler will certainly result in memorable evening. This is why I prefer live performances or live recordings and why I tend to overlook errors. It also serves an orchestra well to have a loyal and intelligent audience.
Contrary to popular belief, musicians in the best orchestras will always make mistakes however they are often covered over or they're faint to the ear. Primarily what makes a good performance is difficult to pin down exactly but I've often found that the experienced and competitive groups will take on a sense of danger whenever they're motivated by artistic inspiration. An inspired Berlin Philharmonic playing Beethoven under the baton of a fiery Furtwängler will certainly result in memorable evening. This is why I prefer live performances or live recordings and why I tend to overlook errors. It also serves an orchestra well to have a loyal and intelligent audience.