as an observer on the ground at this rally, me shared similar thoughts as you: the "oomph" wasn't there. nonetheless, it's good to note that my kopi tiohs around Hougang spoke of a different tune.
then again, me is curious to find out about how you go about putting an imaginary figure of 50% of the crowd coming from other parts of Singapore? why can't it be 40% of the crowd coming from other parts of Singapore or even only 30% of the crowd is from Hougang? is that the same way you've derived your figures to gauge the amount of support for TKL during PE11?