quite well if this is to be believed .. http://www.hitc.com/en-gb/2018/02/12/report-everton-staff-impressed-by-cenk-tosuns-finishing-in-train/
The source article in the Mail has it somewhat different:
To listen to Allardyce, it was impossible not to conclude that concerns lurk behind the scenes.
‘He is struggling with the pace,’ he said. ‘That happens to more players than it doesn’t when they come in in January. There are more who struggle than succeed.
‘As time goes on and the more we get closer to our safety the more we can release and see what he’s got. There is no doubting his goal-scoring ability but you have to have the capabilities to get in those positions to score, and that is the hard bit. We have to try to be patient as the team are winning without him.’