Does Quetext takes long time to check Plagiarism?

I just used Quetext to check Plagiarism on 800 words article. It took about 4 minutes to finish. Is it normal?

Back in the days when I used to use Copyscape, it would check in seconds.

Anyone can through some light on it?

That is a good tool. Time might depend on the amount of sources they are checking. To be honest that is close to impossible to check a lot of sources within a matter of seconds.
4 minutes is good timing.
Do you use free or PRO version?

Quetext is by far the best tool I have ever used for plagiarism. It might take some extra time although shouldn't be taking 4 minutes for 800 words.

Quetext IS the best tool for checking plagiarism. I pay $10 a month for PRO version and it worth every cent. The time of checking the articles vary a lot for me as well and ti takes few minutes for some of 1000 word articles I usually have. I don't find that a problem at all as it is the deepests analysis you can have, copyscape and other tools are not even close. Quetext even check wayback machine, so you can see if the article have plagiarism from old and inactive websites. I was really delighted when I discovered quetext. Now, when I order the articles, I am much more strict with the writers as I discover much more plagiarism then before.