Yes. I have been using Sv156 8 years already, and the frequency
has been getting worse all along. I am not too concerned with the
load, but more of the frequency. I always take in the direction
opposite to the peak direction. Towards Clementi, on weekdays PM
peak, the waiting time is about 20mins. That is really pathetic.
Now with the new time table, if I remember correctly, waiting time
can be up to 22mins. Yet their table shows a max waiting time of
20mins.
I don't see any 22mins leh. 
Whichever the
case, as I have been relying on 156 for >6 years, I can
affirmatively agree that the frequency is really atrocious. I guess
the heavy loading ultimately stems from the unearthly frequencies.
The bus can be fully packed anytime in the afternoon, from
dismissal times, right up to the evenings. Right now, I am
compiling all the trips with bursting loads and shall reflect to
SBST in due time.
