You can test the element with a multimeter. A good element will read around 27-32 ohms.
Also, make sure that you have the top vent open at least halfway or more. Some people think that by closing the vent it will heat faster but all that does is trap moisture and lead to other problems and doesn't help with the heat anyway.
I have an OBS. I got frustrated with the long times it took to reach the desired temp and slow recovery times so about 4 years ago I installed a second 500W element. It now only takes around 8-10 minutes when I first turn it on to reach 225*F.
Having two elements running plus the smoke generator hotplate pulls around 10.2A on a 110V line. The "PIE" formula is P=I*E where P=watts, I=amps, E=volts. Thus, P/E=I.
If you increase the element capacity you should replace the stock control with a PID controller. The factory one isn't designed or tested to handle anything above 500W. There are how-to articles on how to do all this if you're interested.
I'm hoping to smoke a turkey for Easter and don't want to have lunch be served as a late supper.
Also, you probably already read this but it is recommended to finish cooking turkey in your regular house oven to crisp the skin, after you smoke it. The Bradley doesn't get hot enough to do this and the skin may seem a bit rubbery otherwise.