There must be some DSLR users on here saying "I wish". The lag between final press to the picture taken varies over a range of DSLRs. Some of the lower priced ones can be dire.
Sorry however I don't quite believe that. Having handled several various superzoom bridge cameras, I find it hard to believe any of them would out perform even the most standard dSLR in terms of shutter lag. Perhaps the Panasonic Lumix DMC-FZ1000 performs well with lag however the price seems to be out of the thread openers budget. It is a well known fact that shutter lag on bridge cameras are slower than all dSLR's. Here is a table of shutter lag of some bridge cameras...
http://www.cameras.co.uk/html/shutter-lag-comparisons.cfm The table also shows how hard it is taking 5 consecutive images in a row. An dSLR wins hands down here, no questions.
You obviously haven't used many DSLR's. Read the reviews - many are slower than bridge cameras of similar price because the focussing system of a built in lens can be faster than an add-on one.
I would guess it depends on the price of the camera/lens combination and the price of the bridge camera. A very cheap lens of course will probably not be the fastest focusing, but then why compare it to more expensive top of the range bridge cameras that vary between £600-£800. Any half decent lens on a cheap dSLR body will out perform virtually all compact bridge cameras in focusing.
Well you are partly correct in that all bridge cameras I know of do have the zoom lever in front of the shutter button. However, two of my three bridge cameras also provide a ring around the lens barrel or a rocker switch on the left side of the lens barrel to zoom. I've never found zooming with the lever a problem, particularly when photographing aircraft. I use my second finger to zoom with the lever and my first finger to press the shutter. On the Z1000 I have the zoom lever programmed for stepping zoom which is very fast and ideal for fast tarrgets. I can also limit the the range of the zoom so that it stays within a certain range. I've had long zoom interchangeable lenses on DSLRs which have been a real pain to zoom due to the distance one has to turn the focus ring.
BTW, many of the top zoom lenses use a sliding sleeve to focus. I never really got comfortable with the zoom action on my Canon EF 100-400mm IS USM lens and much prefer the ring or the lever on the FZ1000.
The zoom lever in front of the shutter button is simply in an awkward position if you are constantly needing to zoom in or out. Also the zoom on bridge cameras is driven by an electric motor, which isn't exactly fast. A mechanical twist zoom on the lens will always be faster than a zoom driven by a motor. Out of interest, how long does it take to go from the low end of your range (24mm) to the long end of your range (600mm) on your Panasonic FZ1000? Can you explain more about the zoom ring on the lens of your camera.
A twist zoom used by dSLR cameras will be much much quicker to reach and change focal lengths. The push pull of the original 100-400mm was loved by many for it's ease of changing focal lengths... personally I loved it and took to it like a duck to water. However I am aware, many also hated it. The new 100-400mm is a twist ring zoom mechanism, and almost just as fast to use.
When getting into photography, I mulled over getting a cheap bridge camera or a cheap dSLR. The thought of having to learn how to use a dSLR sounded daunting so I went with the bridge camera... a Panasonic FZ-18. After using it for 2 months, a day trip to Portrush Airshow 2008 was when I quickly realised the bridge camera was extremely limiting and it was quickly sold and upgraded to my first dSLR. I haven't looked back since.
viking9, you are most likely the person to know, what is the lowest speed bridge cameras have? Is it 30 seconds or do they also have bulb mode (effectively a shutter speed as slow as you want)?