Submissions in the new year

Hi all,

I just wondered if anyone had anythoughts or experience on the yearly timing of agent submissions.I read somewhere it's best to avoid submitting at the start of the year as they tend to be over run by people endeavouring to fulfil their new year resolution to finally submit their book after however long in the draw.I'm itching to make some new submissions having had four rejections and awaiting the outcome of a request for full ms but don't want to get lost in an avalanche! Also anyone any ideas how long you would expect to wait after they ask for a full ms for their decision or thoughts? Not sure my nerves can take much more! ;)

Thanks