If you are looking to find examples of press releases today, check out the Sunday paper as there will be a ton of them inside. You can also look through your daily and weekly newspapers to find a slew of examples of press releases. It can actually be entertaining reading at times. I find it fascinating to read them as I like to see if the person is any good at writing press releases.
I have to compose press releases all of the time and depending on space constraints my press release will usually run in its entirety. When I am writing a press release and I know that the deadline is imminent, I realize that my press release will be cut off a bit so that it can fit in amongst the others.
It's important though to study examples of press releases if you need to submit them yourself. You'll want to acquaint yourself with the amount of press releases published as well as the usual length. Sometimes if the editor really wants to learn about an event, he or she will contact the individual to write up a story to promote an event.