If this trend continues for a long spell, it might have some statistical validity, but not yet, and if Williams had scored from a sitter and Elder from an easy header, there would have been 2 more 2nd half goals in ER
The only time I remember there being an enduring bias towards one end was the season when Brooke Rd was demolished. I'm fairly sure we didn't score a single goal (1 at most) into the building site end as it was in around 10 games.... that could have been a practical problem, with the absence of a background making it harder to focus