I add a couple comments for posterity:

• All the solutions (except the original one) have the same problem: they don't care about upper-case vowels. All examples were in lower cases so nobody noticed it.
• The original implementation was wrong has it would consider consonant separated by a "non-first-vowel" as contigous ones and squash them if they are equal.
• The illustrious surname "Schwartz" with its consonant-to-vowel ratio of 7.0 render this algorithm pretty useless :)

$|=$_="1g2i1u1l2i4e2n0k",map{print"\7",chop;select$,,$,,$,,$_/7}m{..}g

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