In a typical client-facing presentation, we can have up to 100 slides in our deck with five or six "subject matter experts" speaking to them with usually a 45-minute time limit.
I have never been in a presentation yet where we either finished in 45 minutes or got to all the slides in the deck.
I recognized that early on (and I hate presenting) so I always limit myself to one or two slides when I'm part of a presentation. That way my piece is done rather quickly. In fact, my standard presentation is to simply list bullet points of what my department is responsible for on the slide, speak to them for a minute or two and then ask THEM if they have any questions. That way, the presentation becomes interactive and I'm addressing only what is of interest to the client.
Another reply here nailed it. Powerpoint is excellent fore PREPARING a presentation but an awful way to present it.
When I give a presentaton, I will create multiple slides and then print them out for myself, to use as cue cards. Only one or two slides will be in the actual deck that basically summarize what I am presenting. I speak to the details and then I am prepared to answer any specific questions.
The mistake many people make when presenting is when they read from their slides word for word in a monotone voice. That technique will lose your audience every time. You never read off the slides but speak TO them. Throwing in some humor is good as well, when appropriate. You need to be able to read your audience. Oftentimes, they are getting presentations from other vendors that same day so they are already burned out. So I keep it short and sweet and let them drive the interaction by letting them ask questions. They seem to appreciate that much more than sitting through slide after slide while somebody reads off of them.