Maybe I am old fashion, but I still consider many IT positions as professionals.
Being such we submit our resumes through a recruiting agency most of the times.
Although I have seen many companies, most are big corporations, that insist going through a 50 page on-line application redundantly listing most of what is already on my resume, many times limiting what can describe or many drop down boxes with very limited selections and many times they way listed would probably cause my application to get overlooked for the specific position although highly if not over qualified for.
I usually have a rule, unless applying for a job as at a fast food place, etc, I never fill out a lengthy application form on-line, just basic contact information along with being able to post my resume, too much other requirements and it is to the next of hundreds of positions available for my skills, I see it as almost an insult to a professional occupation and that tells me a lot about a company I would rather not work for.
I have occasionally put in a few apps like that on-line just to see what would happen, not much.
Companies, listen up, not going to get the best unless show you are more interested than that! I only use recruiting agencies, and only a few top ones that I know and trust to weed out the companies for me, kind of a about face, but is as much if not more important for me to work for a great employer and they need a great employee! How they go about seeking top individuals tell me a lot about who I would want to and not want to work for.
And as for the requirements they post, WOW!, I see them wanting someone to wear about a dozen hats, years of experience along with knowing everything, and some of those want to pay like hiring someone right from high school or something ?
I am fortunate I have a very experienced background with systems and networking and yet talking to many companies out there I can see many do not know what type of an individual they need to fill a position. Some think they can find someone in IT that does everything from networks, storage, systems admin, be a DBA, be an electrician, do HVAC work, maybe even build the darn building for the data center (OK, a little too far, well for now), but I see a lot of those requirements stating every discipline in IT.