Maybe they had a few people taking DSLR's in their hand luggage. Every time I go through security, they spend an absolute eternity faffing around with my camera, taking it away for 'further inspection', re-scanning it several times... usually takes a good 10 mins and holds everything up. Never happens at any other airport so I've no idea why EMA differs so much. Rather off-putting to be honest.
Last time I used EMA the security was also backed up a fair bit, never seen it like that before... not sure what's changed but security at EMA seems to take forever to clear these days.