Another attempt on another server. Earlier test was done on irc.twitch.tv, this test is done on irc.rizon.net and this one shows no signs of a limit.
Click to reveal..
[21:02] <~Nillen> test
[21:02] <nillensbot> Counted test 1 times
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[21:02] <nillensbot> Counted test 79 times
[21:02] <nillensbot> Counted test 79 times
[21:02] <nillensbot> Counted test 22 times
[21:03] <~Nillen> test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test test
[21:03] <nillensbot> Counted test 54 times

Nillens @ irc.twitch.tv
Nillen @ irc.rizon.net