I read one paper behind these claims, and it is interesting? Definitely a wild rabbit hole if you are so inclined. Some highlights:

Paedophiles also have lower self-reported height than do hebephiles or teleiophiles (Cantor et al., 2007),

The paper then asserts absolute height is a measure of health.

The distinction they make is interesting. They discern between:

— Right- handedness

— left- handedness

— mixed handedness

and — ambigous handedness

In summary, paedophiles demonstrated high rates of non-right-handedness, … whereas those who had a sexual preference for pubescent children evidenced increased ambiguous-handedness. Analysis of LQ scores indicative of ambiguous-handedness demonstrated that this was the correct classification as opposed to mixed-handedness.

Results support a view of ambiguous-handedness as less pathological than previously hypothesized, …

Rates of left-handedness in most neurologically typical populations are at or below about 11% (Perelle & Ehrman, 1994).

teleiophiles [offenders targeting adults(17+ in this research] were not entirely typical. … with a rate of … 7.4% left-handedness.

Paedophiles, however, demonstrated an accentuation of atypical lateral preference, with an elevated rate of … left-handedness (14.6%) …

Seems like solid research, but some of the results and assertions are … well. Let me put it this way: I would like to see more research. It points to an interesting direction (criminal offenders beeing developmentally delayed), but I would like to know if a differently sourced population exhibits the same traits.