I've tried running Siri on my jailbroken iPhone 4. The phone bogs down tremendously, because apparently Siri is always there, eating up RAM. Even launching Safari occasionally took more than 45 seconds. I uninstalled it - it messed with the iPhone too much.
That said, it's technically possible for Siri to run, but the impact on the UX is terrible. It was unacceptable to me. To the normal public, it would be a broken POS.
Absolute rubbish.
Yes, it's true Spire and Spite use more RAM than Ac!D or iMZDL's recent port (which I now use as my port of choice along with their proxy), but to say it "bogs the phone down tremendously" is absolute tripe.
If launching Safari took 45 seconds then you most likely had too many Cydia tweaks installed alongside Spire/Spite/etc.
Siri does NOT slow down the iPhone 4, and that's not opinion, it's fact which is backed up hundreds of other iMZDL proxy users via Twitter, Facebook, their forum, and this forum.
In fact I'll record a nice little YouTube video of Siri running on my iPhone 4, just for you so people don't take your factually inaccurate ramblings seriously.
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