Some people are very active, but don't visit certain sections of the forum. And often times topics are read, but not commented on.
I had two role play idea topics up for 2 months before people started to take interest in them. It can take a while for topics to get noticed. One was up for 3 days short of 2 months before it had any replies.
I also know that there are people who read fanfics and leave reviews, people who don't read the fanfics at all, and then there are also people like me...who read fanfics but don't leave reviews.
Another thing is that there have been a few authors of longer fanfics who have released new chapters recently - and if the people who are the frequent reviewers are anything like me they'll be more likely to read and review those fanfics first.
Here's my advice:
Try to have as much patience as you can - being in a rush won't be helpful on this forum. I'm pretty sure that there's no "speed games" currently going on (the Hangman & LBT Hangman are probably the closest to speed games currently...and they're not really even fast paced).